I say the Volkswagen/Audi 1.8L Turbo. There are so many variations of that motor it's unbelievable! You can go anywhere from 150hp (Golf GTi 1.8T) up to 225hp (Audi TT Quattro Coupe/Conv.) Thats pretty impressive. It's used in so many cars that i'd say its the most versatile and the best 4 cylinder engine on the planet!
Mike
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2000 Cougar V6
Toronto Cougar Club President
