the lotus exige 260s is the fastest non turbo 4 cylinder car...it will spring to 60 in 4 seconds flat, run the qtr n 12.7 seconds, and top out at 155... It is not turbocharged, but does have a supercharger...the fastest normially aspirated four cylnder is likely the Honda S2000 which is now out of production whch had 237hp and a top speed of 155.
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