how many cyl's enuf: 4? 6? or 12!
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A W12 is stuffed into this GTI -- 650hp, 200mph, 0-60 in about 3.5. Now that's a mod. Wrap that in a Shooting Brake and put four rings on the grill. Done. Except maybe for a turbo kit. 

What a great idea. This GTI looks tough. Who actually built it, and how did they extract the 650HP from a 450HP engine? This car could conceivably give a Bugatti Veyron a run for the money.
In answer to your question; 12 cylinders is more than enough.
In answer to your question; 12 cylinders is more than enough.