Does anyone know what differences there are between the T5 and T6 engine except for the additional turbo? ****, I just found a specs page that shows the T6 engine with 367 hp and 347 lb ft of tq. It's the polestar version. But it's listed as an I4 2 liter engine, so I'm guessing that it's the same basic engine with maybe some minor internal modifications and the additional turbo. I can only imagine how much fun it would be in an EX40.