Thought the Mercedes-Benz A45 AMG had an extraordinarily powerful 2.0-litre turbocharged four-pot engine? Think again. And then think some more, because Audi has just revealed the TT Sport Quattro Concept in Geneva. It has a 2.0-litre turbocharged 4cyl. And it has 420bhp.
The fight is on... “This car is designed for racing,” explains Dr Ulrich Hackenberg, Audi’s board member for technical development. And that engine is quite a development.