We pitch the 435bhp petrol-powered BMW M3 against the 345bhp diesel-engined Alpina D3 to see which is best
Steve Sutcliffe has the keys to two very fast versions of the BMW 3-series: the 435bhp petrol BMW M3 and the 345bhp diesel Alpina D3. Should you satisfy your high-performance saloon cravings with a petrol or a diesel engine? Let's find out.
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