Zagato s design philosophy for the car sums up the key attributes of the AC 378 GT Zagato - simple, light and aerodynamic. With a kerb weight of only 1,465 kg and a power output of 434 bhp from its all-American GM 6.2 litre V8 engine performance is electrifying. With an unrestricted top speed of 185 mph and a 0-60 acceleration time of sub 4 seconds there can be few doubts about the new car s ability to perform in true AC style.