Zagato-bodied lightweight Alfa — tubular spaceframe, Kamm tail, twin-cam four; 112 built.
The Giulia TZ (Tubolare Zagato) was developed from 1963 by Autodelta and Zagato for GT-class racing. The car combined a tubular steel spaceframe chassis (the 'Tubolare' designation), Zagato aluminium bodywork with the characteristic Kamm tail, and the 1,570cc Alfa Romeo twin-cam four developing approximately 112 bhp in road specification and up to 170 bhp in racing trim. Suspension was independent at all four corners with inboard rear disc brakes.
Production was small — 112 TZ1 cars built between 1963 and 1965, followed by 12 fibreglass-bodied TZ2 evolutions for racing only — and the cars competed successfully in their class at Le Mans, Sebring, the Targa Florio and the Tour de France Automobile.
Defining Autodelta/Zagato collaboration; the first true factory race-bred GT Alfa of the modern era and a recurring class winner.
| Variant | Years | Production | Notes |
|---|---|---|---|
| TZ1 | 1963–1965 | 112 | Aluminium Zagato body; road and race. |
| TZ2 | 1965–1967 | 12 | Fibreglass body; race-only. |
Start with identity, paperwork and originality. For the Alfa Romeo Giulia TZ1, the strongest cars have continuous ownership history, matching numbers where applicable, original books and tools, factory build documentation and evidence of work by manufacturer-approved specialists. Period racing history, FIVA / FIA HTP papers, originality of body and chassis numbers.
Twin-cam four is well-supported by Alfa specialists; rebuilt cars should retain original block numbers. A proper pre-purchase inspection includes cold-start behaviour, ECU diagnostics and fault-code history (where applicable), leak-down or compression testing, underbody photography, suspension and chassis inspection, brake condition and a long enough road test to expose heat-related faults. Deferred maintenance on a car of this class is almost always more expensive than buying a better-sorted example.
Use a paint-depth gauge, lift access and a specialist familiar with the model's factory panel gaps and finish standards. Collector value is dramatically affected by structural repairs, refinished panels, poor paintwork and missing factory trim or option content. Documented cosmetic refresh is acceptable; concealed accident or fire damage must be priced severely.
Documented competition history, Autodelta build records and original Zagato bodywork are the value anchors. Specification, colour, options and limited-build variants move values significantly. Buy the best-documented example in the most desirable specification you can justify, rather than a tired example of a rarer derivative that will need years of corrective work.
| Date | Auction | Car | Mileage | Result |
|---|---|---|---|---|
| 2026-03-05 | Gooding Christie's Amelia Island Auctions, Lot 21 | 1965 Giulia TZ | — | US$885,000 Sold |
| 2025-08-15 | RM Sotheby's Monterey, Lot 115 | 1964 Giulia TZ 'Double Bubble' | — | US$555,000 Sold |
| 2025-03-06 | Gooding Christie's Amelia Island Auctions, Lot 144 | 1965 Giulia TZ | — | US$1,160,000 Sold |
| 2024-08-15 | RM Sotheby's Monterey, Lot 325 | 1965 Giulia TZ | — | US$819,000 Sold |
| 2024-06-29 | Artcurial Motorcars à Saint-Tropez, Lot 145 | 1965 Giulia TZ | — | €667,520 Sold |
| 2023-02-01 | RM Sotheby's Paris, Lot 182 | 1965 Giulia TZ | — | €1,140,000 Sold |
Autodelta / Zagato pedigree, eligibility for Mille Miglia and Le Mans Classic.
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.
