McLaren P13 to Feature 3.8L V8 with 444 HP By Jason Siu Dec 11 2013 Share this Article Tweet The McLaren P13, which is due to go on sale in 2015, will be powered by a 3.8-liter twin-turbo V8 engine with 444 hp. Continue Reading... Filed under: British Coupes Exotics Featured Articles Luxury Cars McLaren Sports CarsTags: McLaren, mclaren p13, mclaren p13 engine, mclaren p13 specifications, p13, p13 engine