Building the turbo Aston Martin V8 engine: Some reverse engineering. Previously we found out the Aston Martin V8 engine ‘breaths’ pretty well even in the high RPM. We determined this by dynoing the car. The torque was constant up until the rev limit. All aspects in an engine determine the general performance of the engine, but there is one main item in the whole engine that has the most influence on the characteristics of the engine and that is the valve opening and closing timing.