The McLaren 600LT produces 600hp from its twin-turbo 3.8-litre V8. That, friends, is a lot of power. But then again, the fourth car to receive McLaren’s Longtail badging is a bona-fide supercar.

(Click HERE for our McLaren 600LT review)

What would you say then, if we told you that a tuning company had managed to extract the same amount of power from a Mercedes-AMG A 45 S? Balderdash, you’d cry – if you were raised in Elizabethan times.

Renntech is the company in question, and its 600hp kit will apparently be available in the coming months. To squeeze that amount of power from the baby Merc’s 2.0-litre four-pot, there’s an ECU tune, a modified turbocharger and new exhaust system.

We’d imagine it also requires plenty of faith in the A45’s 8spd gearbox and all-wheel drive system. The standard A45 S produces a not insignificant 420hp, of course.

There’s no word on what 600hp does to the A45 S’s performance figures, although expect the 0-100km/h time of 3.9secs and the top speed of 268km/h to improve – if it can get the power down.

If that’s a bit much for you though, don’t worry. Renntech is also working on upgrade packages that produce 475hp and 550hp respectively. Ah yes, far more sensible.

STORY Greg Potts