Alfa Romeo 960A (1.75 TBi)

Alfa Romeo's 1.75 turbocharged four — the 960A — in the 4C and the Giulietta Quadrifoglio Verde.

The displacement is deliberate. 1750 was Alfa's own designation in the 1960s and the modern engine was sized to reclaim it — a marketing decision that produced an unusual capacity, and one worth knowing when a parts search returns nothing for 1.8.

In the 4C it is an all-aluminium engine mounted amidships behind the cabin, which changes every access assumption: heat soak is real, and routine work is harder than on the Giulietta's transverse installation.

Its known items are the ordinary direct-injection turbo set — intake-valve carbon at mileage, and a turbocharger whose life tracks oil condition — with the mid-engined car's heat making the second matter more.

It is a low-volume engine and specialist experience is correspondingly thin outside the dealer network.