Probably my favorite classic Aston (the DB4 GT/GT Zagato)...
Engine is inline 6, 3.7 liters.
Max BHP is in th low 300s (varies car to car)..., although at the time it was one if not the quickest road car one could get... the hardcore Ferrari 250 versions had similar performance, but were built ~ 3 years after..
This was the the sportiest David Brown Era Aston. The DB5 and DB6 were based on the Vantage versions of the DB4, but ware significantly heavier than the DB4 GT