The Silver Arrows — Mercedes-Benz's state-backed Grand Prix machines that defined the most extreme era of pre-war racing.
The W25 (1934–1936), W125 (1937) and W154 (1938–1939) were Mercedes-Benz's Grand Prix cars under the 750 kg formula and its successors. The W125 of 1937 produced approximately 600 bhp from a 5.7-litre supercharged straight-eight — a figure not matched in Formula 1 until the turbo era of the 1980s. The W154 used a supercharged 3-litre V12 under the revised formula. Drivers included Caracciola, Lang and Seaman. Surviving cars are nearly all in museum collections; almost none are in private hands.
Among the most technically extreme and politically loaded racing cars ever built. They redefined the limits of pre-war engineering.
| Variant | Years | Production | Notes |
|---|---|---|---|
| W25 | 1934–1936 | Not separately recorded | First Silver Arrow; 4.0–4.7L supercharged eight. |
| W125 | 1937 | Not separately recorded | 5.7L supercharged eight; approx. 600 bhp. |
| W154 | 1938–1939 | Not separately recorded | 3.0L supercharged V12; later revised W163. |
For pre-war and vintage cars such as the Mercedes-Benz W25 / W125 / W154, 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. Verified period chassis identity; effectively all top examples are museum-owned.
Supercharged Mercedes Grand Prix engines are operated only by Mercedes-Benz Classic Centre and a tiny circle of specialists. Rebuilds are seven-figure undertakings. 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.
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.
Museum-grade provenance; private-hands sales are almost unheard of. Continuation cars exist but are not original. 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.
No verified public auction results are currently available for this model. We publish sale figures only from examples we have confirmed against auction house records, and will update this guide as results appear.
Among the most historically significant racing cars ever built. Private examples are essentially priceless.
Our view, not advice. This section is Car Collector International's editorial judgement on where this model sits in the collector market, based on the production, specification and market data set out in this guide. It is not a recommendation to buy or sell and it is not investment advice. Values can fall as well as rise.
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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.
