Alfa Romeo Giulia GTA (105)
Why 5.5: Aluminum body panels over the standard Giulia Sprint GT shell cut real weight to 745 kilograms and moved the balance to a near-perfect 50/50 — the whole reason Alfa's twin-cam four could beat V8-powered cars twice its size in period touring-car racing. That competition identity never really faded into collector storage the way it did for some of this shelf's other homologation specials: genuine GTAs are still regular sights on historic touring-car grids at the Tour Auto and Spa Six Hours.
Layout
Natural habitat
Ride comfort
Sound
The twin-plug 1.6 twin-cam breathes through twin Weber 45s and a straight-through exhaust, and on a historic grid it is pure hard induction rasp. But four small cylinders give it no depth below 4,000 rpm, so it sits just under the Busso-engined Alfas rather than beside them.
4-cylinder · naturally aspirated · 7,000 rpm redline · rated 8.1 / 10 for engine sound
Market value
Median asking price, good condition · €5k (1965) → €552k (2026), trending up · illustrative data
Child seats · ISOFIX
Built before ISOFIX existed, so there are no anchor points at all. A child seat here is a seatbelt installation, and the belt geometry of the period was not designed with one in mind.
Derived from production years and seating layout, not a per-car source. ISOFIX was standardised as ISO 13216 in 1997, required on new EU model types from 2011 and on all new EU cars from 2014.
The long version
Autodelta built the GTA specifically to win the European Touring Car Championship against BMWs and Lotus Cortinas with twice the displacement, and it did exactly that by treating weight as the enemy — aluminum doors, bonnet and boot lid, thinner glass, a stripped interior in Corsa spec. That competition-first design brief is why the GTA never fully crossed over into pure collector storage the way some period rivals did: the car's entire reason for existing is lap time, and the historic-racing community that grew up around European touring cars kept demanding real examples for real grids. Values have followed the broader vintage-Alfa market upward hard in the last decade, but unlike a garage-kept Gullwing or Lusso, a genuine GTA is still more likely to turn up at a circuit than a concours lawn.