The entry-level petrol doesn't use a supercharger like the more powerful T6, but it is turbocharged. It has perfectly adequate performance for most situations (it'll hit 0-62mph in a claimed 7.9sec), but you do need to work it quite hard to realise that performance. It is pretty refined when revved, though, but while it'll reach 30mpg driven gently on the motorway, you'll struggle to hit 25mpg around town.