British brawn against German efficiency, but which is quicker against the clock? br br This latest Drag Battle pits Jaguar's 542bhp supercharged V8 against Porsche's 572bhp twin-turbo flat-six. Both are four-wheel drive, the F type has a conventional 8-speed auto gearbox, the 911 a 7-speed PDK and the Turbo S has a 200kg weight advantage.