The world's major sportscar-makers all have major parent companies behind them: Ferrari and Maserati have the Fiat Group while Lamborghini (and Bugatti) are under the VW/Audi umbrella. Pagani Automobili SpA, however, remains independent, but hooked up with Mercedes to provide the motivation in the heart-racing Zonda supercar. Not to worry, though, because by all accounts the V12 engine that AMG builds by hand for Pagani is an awesome powerplant. Its displacement and output have increased from six liters and 408 horsepower in the original C12 to 7.3 liters and 602 hp in the latest Zonda F. With dedicated development like that, it would be foolish for Pagani to look elsewhere or consider designing its own engine. So it's probably a good sign that Pagani and AMG have renewed their partnership, the fruits of which we're looking forward to seeing in the highly anticipated successor to the Zonda, whenever it debuts.