Classic · 1936–1940

BMW 328

Q: M328 hemi-head six cross-pushrod valve gear wear

Symptoms: Top-end rattle from the vertical/horizontal pushrod arrangement operating the hemispherical head valves; power falls off before compression numbers do. Inspection: Compression and leak-down on all six; specialist strip-inspection of the cross-pushrod rockers; verify recent valve clearances by a marque-experienced shop. Typical repair cost: $25,000 – $60,000 (top-end rebuild).

Q: Aluminium panels over steel tube frame — galvanic corrosion at panel-to-frame joints

Symptoms: Blistering at panel edges, hairline cracks in alloy over frame tubes, filler at wheel-arch lips and around the tail. Inspection: Paint-depth gauge over all outer panels; strip-back inspection at panel-to-frame interfaces; probe frame tubes for hidden corrosion. Typical repair cost: $40,000 – $120,000 (correct body and frame restoration).

Q: '328' built up from 326 or 327 running gear

Symptoms: Chassis or engine numbers fall outside the documented 328 range (chassis 85001–85464); frame geometry or cross-tube layout disagrees with factory drawings. Inspection: Cross-reference chassis and engine numbers with the BMW Group Classic archive in Munich and the BMW 328 register; require a written provenance statement. Typical repair cost: Value impact: factory-original vs. built-up differential is measured in seven figures.

Q: Hydraulic brake system seal decay and master-cylinder wear

Symptoms: Long pedal, fluid weep at wheel cylinders, pull under braking. Inspection: Full hydraulic service history; static and dynamic brake test; inspect master cylinder and flexible hoses. Typical repair cost: $4,000 – $10,000.

Q: Hurth 4-speed synchromesh wear (2nd and 3rd)

Symptoms: Crunch into 2nd cold, baulk on quick downshifts, jumping out of 3rd on overrun. Inspection: Full road test through all gears cold and hot. Typical repair cost: $6,000 – $14,000.

Q: Marginal radiator capacity in modern traffic

Symptoms: Coolant loss in slow running, sustained temperatures above 95°C. Inspection: Pressure-test radiator and header; verify core has been re-cored to a higher-capacity specification. Typical repair cost: $3,000 – $8,000.

Q: Mille Miglia or period-race claims without documentation

Symptoms: Seller cites period competition history that is not corroborated in the BMW Group Classic archive or in the standard 328 registers (Rainer Simons, Halwart Schrader). Inspection: Independent verification against factory records and marque registers before any deposit; period photographs are supporting evidence, not proof. Typical repair cost: Value impact: a genuine period-competition 328 trades at a multiple of a road car.

Fritz Fiedler's 2-litre roadster — the cross-pushrod hemi-head six that beat Bugatti and Alfa on power-to-weight and set the template for the post-war sports car.

Roadster

Car Collector International Editorial

Overview Variants & Specs Collector Variants Buyer's Guide What to Pay Ownership Common Problems Valuation Auction Results Investment Outlook Recommended Network

Overview

Why this car matters

Launched at the Nürburgring Eifelrennen in June 1936, the BMW 328 paired a lightweight tubular-steel chassis and aerodynamic aluminium bodywork with the 1,971cc M328 inline-six — Fritz Fiedler's design in which a single side-mounted camshaft operated hemispherical-head valves via a cross-pushrod arrangement, avoiding the cost of a twin-cam layout while giving twin-cam breathing. In road tune the M328 produced around 80 bhp; in works competition trim well over 130 bhp. Only 464 328s were built at Eisenach between 1936 and 1940 before wartime priorities ended production.

On the track the 328 was decisive. It won its class at the 1936 Eifelrennen on debut, won the RAC Tourist Trophy in 1937 and, most famously, won the 1940 Mille Miglia outright with the Touring-bodied 'Berlin-Rome' coupé of Huschke von Hanstein and Walter Bäumer. Beyond BMW's own competition programme, the M328 engine went to Bristol after the war as the basis for the Bristol 400 and the AC-Bristol, and its hemi-cross-pushrod head influenced the Jaguar XK6 and generations of Anglo-American sports engines.

The 328 is the bridge between the vintage sports car and the modern one — the first car of its size to combine a lightweight tubular chassis, an efficient hemi-head six, hydraulic brakes and independent front suspension in a fully resolved package, and one of the most-copied designs of the 20th century.

Variants

Range and production

Variant	Years	Production	Notes
328 Roadster (standard)	1936–1940	464	464 total factory-built 328s across all bodies at Eisenach — a well-corroborated figure, quoted by BMW's own press materials and by every major independent 328 register and reference (Simons, Schrader, BMW Group Classic). The standard open two-seat roadster on the Eisenach chassis accounts for the great majority; the specific roadster sub-total shows minor variance across sources (403 vs 426 in two established references), reflecting how factory-team and special-bodied cars are counted.
328 Mille Miglia Coupé (Touring 'Berlin-Rome')	1939–1940	3	Superleggera-bodied coupés by Touring of Milan; one won the 1940 Mille Miglia outright. Included within the 464 total.
328 Mille Miglia Roadster ('Bügelfalte')	1939–1940	2	Factory-bodied lightweight competition roadsters with the distinctive creased-flank profile. Included within the 464 total.

Collector Variants

Limited & special editions

The models below represent the most significant limited and special edition variants — factory-produced cars that command meaningful premiums over standard examples and warrant specific attention from serious collectors.

328 Mille Miglia Coupé (Touring 'Berlin-Rome') · 1939–1940

Distinguishing features: Three factory competition coupés built by Carrozzeria Touring of Milan on the 328 tubular chassis, using Touring's Superleggera construction (aluminium panels over a small-diameter steel tube framework). Full-envelope aerodynamic bodywork with faired-in headlamps, tailored to the proposed 1940 Berlin–Rome road race. Works-tuned M328 engine with polished porting and higher compression, uprated triple-Solex induction and a shorter final drive. The Huschke von Hanstein / Walter Bäumer car won the 1940 Mille Miglia (Gran Premio di Brescia) outright; the same chassis, restored, returned to win the Mille Miglia Storica in 2004 — the only car in history to win both the original and the modern revival.
Value premium: Effectively priceless in open-market terms: no example has traded publicly in living memory, and the surviving cars are museum-held. Any hypothetical sale would be a multiple of the strongest 328 road roadster result — well into eight figures, and negotiated privately rather than at auction.
Inspection points: Confirm chassis identity against the BMW Group Classic archive in Munich and the standing 328 registers (Simons, Schrader). Verify the Touring Superleggera framework has not been reworked outside period practice, that the aluminium skin is original or documented period repair, and that the works-specification engine internals and induction are period-correct. Continuous documented ownership, period photographs from the 1940 Mille Miglia and subsequent events, and any FIA/FIVA papers are essential.
Authentication: Only three were built and each is individually known and registered. A car claiming to be a Touring 'Berlin-Rome' coupé is either one of the three documented chassis or it is a later re-creation on a standard 328 (or 326/327-derived) chassis — the latter should be priced strictly as a tribute. BMW Group Classic and the international 328 registers can confirm chassis identity; period competition history must be corroborated in the same records, not accepted on seller narrative alone.

328 Mille Miglia Roadster ('Bügelfalte') · 1939–1940

Distinguishing features: Two factory-bodied lightweight competition roadsters built by BMW for the 1940 Mille Miglia to run alongside the Touring coupés. Nicknamed 'Bügelfalte' ('trouser crease') for the sharp longitudinal crease running the length of each flank — a signature body detail unique to these two cars. Reduced-weight aluminium bodywork over the standard tubular chassis, works-tuned M328 engine, cycle-wing or partially faired front wings depending on car, and a stripped competition interior. Class-winning finishers at the 1940 Mille Miglia behind the Touring coupé.
Value premium: As with the Touring coupés, effectively unavailable on the open market — one is in the BMW Museum in Munich. Any hypothetical sale would clear the strongest road-328 results by a multiple, negotiated privately.
Inspection points: Verify chassis identity against the BMW Group Classic archive; confirm the distinctive creased-flank aluminium bodywork is original or documented period repair rather than a later interpretation; confirm works engine specification and induction. Continuous documented ownership, period Mille Miglia photographs and factory works-team records are essential.
Authentication: Only two were built and both are individually known. Any car offered as a Bügelfalte roadster must be one of the two documented chassis, confirmed by BMW Group Classic and the 328 registers. Re-creations on standard 328 chassis exist and must be priced as tributes, not as factory works cars — the value differential is measured in eight figures.

Production figures sourced from official marque records and specialist registers. Verify chassis documentation with the relevant marque register before purchase.

Buyer's Guide

What to look for

Provenance and originality

For pre-war and vintage cars such as the BMW 328, provenance is paramount. Chassis and engine number matching, period coachbuilder records, factory build sheets where available, continuous ownership documentation, original handbooks and any competition or concours history are the foundation of value. Matching chassis and engine numbers within the 85001–85464 range, BMW Group Classic archive confirmation, original Eisenach-built bodywork or verified period coachwork (Wendler, Weinberger, Drauz), continuous ownership history, and any documented period competition record.

Mechanical inspection priorities

The M328 six's cross-pushrod hemi head is sophisticated for its era and expensive to rebuild correctly; the valve gear, timing chain and cylinder head are the hard costs. Verify a recent specialist rebuild, check hot oil pressure, and ensure the correct triple Solex carburettor set-up is fitted and synchronised. A pre-purchase inspection by a recognised marque specialist should include compression and leak-down testing, magneto and ignition checks, chassis straightness and frame survey, axle and steering wear assessment, brake system review (mechanical or hydraulic per period), and an extended road test on varied terrain to expose carburation, cooling and gearbox issues that only emerge under sustained running.

Body, chassis and originality of coachwork

Pre-war coachwork is rarely truly original after a century of use. Establish whether the body is original to the chassis (period photographs, build records, coachbuilder plates), whether it has been re-bodied at any point, and the standard of any restoration. Quality of timber framing, ash health, panel beating and paint depth are all critical. Concealed structural rot, re-bodies presented as original, and 'tribute' cars built on later or unrelated chassis must be priced accordingly.

Specification and event eligibility

A documented one of the 464 factory-built 328s with matching chassis and engine numbers, verified against the BMW Group Classic archive. Period competition history (Mille Miglia, TT, Le Mans class wins) is the top tier; post-war Bristol-engined re-creations and 326/327-derived tributes are a separate market and must be priced accordingly. For vintage cars, event eligibility — Mille Miglia, Goodwood Revival, Pebble Beach, VSCC events, Le Mans Classic — can underwrite a substantial proportion of market value. Verify FIA/FIVA papers, period race history where claimed, and the car's standing with the relevant marque registry before purchase.

Pricing

What to pay

Mille Miglia Coupé / works-history car

USD$8,000,000 – $25,000,000+

GBP£6,000,000 – £19,000,000+

EUR€6,800,000 – €22,000,000+

Touring 'Berlin-Rome' coupés and works-team roadsters with documented period competition history — museum-tier, essentially by negotiation.

Concours original 328 Roadster

USD$1,400,000 – $2,200,000

GBP£1,050,000 – £1,650,000

EUR€1,180,000 – €1,850,000

Matching-numbers, BMW Group Classic-verified roadster with original Eisenach body, correct trim and continuous history.

Excellent 328 Roadster

USD$900,000 – $1,300,000

GBP£680,000 – £980,000

EUR€760,000 – €1,100,000

Restored matching-numbers roadster with good documentation; period-correct rather than concours-original.

Driver 328 Roadster

USD$600,000 – $850,000

GBP£450,000 – £640,000

EUR€510,000 – €720,000

Presentable, mechanically sorted roadsters — often older restorations, minor originality compromises.

Project / rebuilt or non-matching

USD$300,000 – $550,000

GBP£225,000 – £415,000

EUR€255,000 – €465,000

Non-matching-numbers cars, replacement bodywork, or long-stored projects. Verify carefully against the register before committing.

Regional ranges authored independently — each reflects its local market, not an FX conversion

Ownership

Living with it

Typical mileage

300–2,000 miles typical for vintage use; rally cars higher

Service interval

Annual full service; pre-event check before any rally or tour

Annual running cost

$8,000 – $35,000 depending on use, storage and event programme

Fuel economy

10–18 mpg typical; heavy carburetted engines run rich

Insurance

Use a specialist agreed-value vintage policy with declared value reviewed annually. Premiums reflect declared value, storage, event use and driver experience with pre-war machinery.

Maintenance planning

Vintage cars require disciplined preventive maintenance: lubrication regimes, magneto service, carburettor synchronisation, brake adjustment, and timber and trim conservation. A car used regularly and serviced annually by a specialist will outlast a stored example neglected for decades.

Specialist access and parts

A small international network — BMW Group Classic in Munich, plus a handful of 328-experienced restorers in Germany, the UK and the US — handles serious 328 work. Post-war Bristol-engined derivatives (400/401, AC-Bristol) share the engine architecture but not the chassis, coachwork or value. Confirm the availability of marque specialists, period-correct fasteners, coachwork trim, instruments and tyres before committing. A car requiring fabricated one-off parts will absorb time and cost that a similar example with active specialist support will not.

Common Problems

Known issues by system

Engine

M328 hemi-head six cross-pushrod valve gear wear

Major$25,000 – $60,000 (top-end rebuild)

Symptoms — Top-end rattle from the vertical/horizontal pushrod arrangement operating the hemispherical head valves; power falls off before compression numbers do.

Inspection — Compression and leak-down on all six; specialist strip-inspection of the cross-pushrod rockers; verify recent valve clearances by a marque-experienced shop.

Body

Aluminium panels over steel tube frame — galvanic corrosion at panel-to-frame joints

Major$40,000 – $120,000 (correct body and frame restoration)

Symptoms — Blistering at panel edges, hairline cracks in alloy over frame tubes, filler at wheel-arch lips and around the tail.

Inspection — Paint-depth gauge over all outer panels; strip-back inspection at panel-to-frame interfaces; probe frame tubes for hidden corrosion.

Identity

'328' built up from 326 or 327 running gear

CriticalValue impact: factory-original vs. built-up differential is measured in seven figures

Symptoms — Chassis or engine numbers fall outside the documented 328 range (chassis 85001–85464); frame geometry or cross-tube layout disagrees with factory drawings.

Inspection — Cross-reference chassis and engine numbers with the BMW Group Classic archive in Munich and the BMW 328 register; require a written provenance statement.

Brakes

Hydraulic brake system seal decay and master-cylinder wear

Moderate$4,000 – $10,000

Symptoms — Long pedal, fluid weep at wheel cylinders, pull under braking.

Inspection — Full hydraulic service history; static and dynamic brake test; inspect master cylinder and flexible hoses.

Gearbox

Hurth 4-speed synchromesh wear (2nd and 3rd)

Moderate$6,000 – $14,000

Symptoms — Crunch into 2nd cold, baulk on quick downshifts, jumping out of 3rd on overrun.

Inspection — Full road test through all gears cold and hot.

Cooling

Marginal radiator capacity in modern traffic

Moderate$3,000 – $8,000

Symptoms — Coolant loss in slow running, sustained temperatures above 95°C.

Inspection — Pressure-test radiator and header; verify core has been re-cored to a higher-capacity specification.

Provenance

Mille Miglia or period-race claims without documentation

CriticalValue impact: a genuine period-competition 328 trades at a multiple of a road car

Symptoms — Seller cites period competition history that is not corroborated in the BMW Group Classic archive or in the standard 328 registers (Rainer Simons, Halwart Schrader).

Inspection — Independent verification against factory records and marque registers before any deposit; period photographs are supporting evidence, not proof.

Valuation

Current value bands by region

Concours

USD: $1,850,000
GBP: £1,400,000
EUR: €1,560,000

▬ +1% 12-mo

Excellent

USD: $1,150,000
GBP: £860,000
EUR: €970,000

▬ 0% 12-mo

Good

USD: $780,000
GBP: £585,000
EUR: €660,000

▬ 0% 12-mo

Fair

USD: $520,000
GBP: £390,000
EUR: €440,000

▼ -1% 12-mo

Project

USD: $360,000
GBP: £270,000
EUR: €305,000

▼ -2% 12-mo

Each region quoted in its local currency — independent market readings, not FX conversions

328 values have been range-bound over the past twelve months. The market is small — 464 cars built, few change hands publicly in any given year — so trades happen more often through marque specialists and private treaty than at open auction, and headline results depend heavily on which specific car surfaces. Mille Miglia coupés and works-history cars trade on a separate curve entirely. For road roadsters, matching numbers, BMW Group Classic archive verification and originality of the Eisenach bodywork are the dominant value drivers.

Auctions

Recent results

Date	Auction	Car	Mileage	Result
2026-01-24	Barrett-Jackson Scottsdale 2026	1937 328 Roadster Result independently verified against Barrett-Jackson's Scottsdale 2026 published results. Below the range for a matching-numbers, archive-verified Eisenach roadster — reflecting a car sold on presentation rather than on register-confirmed originality.	—	$176,000 Sold
2025-08-30	Worldwide Auctioneers Auburn 2025	1937 328 Roadster Result independently verified against Worldwide Auctioneers' published Auburn 2025 results. Sits in the lower half of the driver-to-excellent band for a road roadster; matching-numbers and BMW Group Classic archive verification would move the same car into the excellent-to-concours tier.	—	$491,750 Sold

Investment

Long-term outlook

Blue ChipHorizon: 10+ years

Finite production of 464, decisive period competition record, and an engine architecture that shaped the post-war sports car all support a durable floor. Mille Miglia coupés and works cars are effectively unrepeatable and trade as such. For road cars, the constraint is the small pool of matching-numbers, archive-verified examples; the risk is confusion with post-war Bristol-engined re-creations and 326/327-based tributes, which authentication solves rather than mitigates.

Recommended

The trusted network

Specialists

BMW marque specialist
View →
UK / Europe
BMW 328 restoration, mechanical service and originality reviews.
Pre-war coachwork specialist
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International
Timber framing, ash conservation, panel beating and period-correct paint for pre-war coachwork.
Concours preparation studio
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International
Concours preparation, detailing and event support for pre-war and vintage cars.
Hagerty
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USA / UK / EU
Agreed-value collector insurance specialising in pre-war and vintage cars.
Lockton Performance
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UK / EU
Specialist agreed-value cover for significant pre-war and competition cars.

Storage

Windrush Car Storage
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Cotswolds, UK
Climate-controlled storage and collection management for pre-war and classic cars.
Autovault
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Bicester, UK
Secure climate-controlled storage at Bicester Heritage with inspection programmes.
Classic Car Club Manhattan
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New York, NY
Secure urban storage for collector and pre-war cars.

Transport

CARS UK
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UK & Europe
Enclosed concours and event transport for pre-war and vintage machinery.
Reliable Carriers
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USA (national)
Enclosed coast-to-coast transport for pre-war American and European cars.
FERRLOG
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Italy / Europe
Air-ride enclosed transport for Italian and European collector cars.

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The valuation figures in this guide are for research purposes only and do not constitute financial or investment advice. See our full disclaimer.