The Autodelta lightweight — European Touring Car Champion 1966, 1967 and 1968.
Developed by Autodelta — Alfa Romeo's racing division — as a lightweight homologation special for FIA Group 2 touring car racing. GTA (A = Alleggerita, Italian for lightweight): outer body panels replaced with aluminium alloy; inner panels of thinner-gauge steel bonded and pop-riveted together; plexiglass side and rear windows; magnesium alloy engine components (valve cover, sump, timing cover, bell housing) and Campagnolo magnesium alloy wheels on the road version; lightweight interior. Dry weight reduced from over 900 kg in the standard Sprint GT to 745 kg in the GTA Stradale.
Engine: 1,570 cc twin-cam inline-four with twin-spark-plug cylinder head (two plugs per cylinder), higher compression, sportier camshafts and twin Weber 45 DCOE carburettors — 115 bhp at 6,000 rpm (Stradale); up to approximately 170 bhp (race/Corsa). The GTA 1300 Junior, introduced 1968, used a 1,290 cc version of the same architecture: approximately 450 built (sources give figures up to 492); the Junior road version lacked the magnesium components and plexiglass of the 1600. Won the European Touring Car Championship in 1966, 1967, and 1968.
Original magnesium components and documented Autodelta build records are the primary value drivers; the GTAm commands a separate premium.
| Variant | Years | Production | Notes |
|---|---|---|---|
| GTA 1600 | 1965–1969 | ~500 | ~500 per Stellantis Heritage (493 also published from production records). 1,570 cc twin-plug DOHC I4, 115 bhp (Stradale); aluminium outer panels, magnesium components, Campagnolo wheels, plexiglass glass; 745 kg. Built to the FIA Group 2 minimum homologation requirement. |
| GTA 1300 Junior | 1968–1975 | ~450–492 | 1,290 cc twin-plug DOHC I4, 96–110 bhp road versions; fewer lightweight features than the 1600 GTA. |
Authenticate stamped chassis and engine numbers against factory or club records. For the GTA specifically, verify Autodelta build records, originality of the magnesium components (valve cover, sump, timing cover, bell housing) and Campagnolo wheels, plexiglass windows, and matching-numbers status. Distinguish Stradale, Corsa and GTAm specifications.
Confirm body originality, panel identity and restoration standard against a marque specialist.
Confirm continuous service history and any rebuild history for the engine, transmission and driveline against a marque specialist.
Restoration standard, originality of body and driveline, and any documented ownership record are the main value drivers.
Regional ranges authored independently — each reflects its local market, not an FX conversion
Each region quoted in its local currency — independent market readings, not FX conversions
Readings reflect an excellent GTA 1600 Stradale with correct components; documented Corsa and race-history cars trade substantially above.
Authored against aggregate public-market data and named price guides as set out in What to Pay; regional readings are independent, not FX conversions.
| Date | Auction | Car | Mileage | Result |
|---|---|---|---|---|
| 2025-09-13 | Bonhams Goodwood Revival 2025, Lot 127 | 1966 Alfa Romeo Giulia Sprint GTA Coupé — chassis 613857 In-period race history including campaigning by Sicilian driver Vito Copo from circa 1968; long-term European ownership from 2008. Verified directly from the Bonhams lot page (July 2026). | — | £155,250 inc. premium Sold |
| 2025-08-15 | RM Sotheby's Monterey 2025, Lot 118 (from The Quadrifoglio Collection) | 1966 Alfa Romeo Giulia Sprint GTA — chassis AR 613790 Complete nut-and-bolt restoration late 1980s; mechanical refresh by Horst Kwech 2008. Engine AR00502 15828 now fitted was sourced from a 1965 Giulia GTC; non-matching engine disclosed in RM Sotheby's lot description. Verified directly from the RM Sotheby's lot page (July 2026). | — | $140,000 Sold |
Original magnesium components and documented Autodelta build records are the primary value drivers; the GTAm commands a separate premium.
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.
