How much power is too much? With 900bhp the minimum standard for a hypercar nowadays, you could argue there is no such thing. Mercedes, or more specifically AMG, have decided to deliver their A45 AMG hot hatch with 360bhp. It's probably enough. 4wd takes care of potential traction problems, and the resulting 4.8secs 0-62mph sprint is complimented by the limited 155mph top speed. Quite how it manages the claimed 40mpg presumably employs magic