GREATEST INLINE FOUR ENGINES
Jul 29, 2020
4 minutes
BY CHRIS THOMPSON + MOTOR STAFF
01 GREATEST INLINE FOURS
BMW S14B25
PRODUCED: 1989-91
DISPLACEMENT: 2467cc
INDUCTION: NA
The engine under the bonnet of what might be BMW’s most iconic car is not one of the inline sixes the Bavarians are praised for. No, instead, a humble inline four is at the heart of the E30 M3.
Okay, in its peak form, perhaps a 2.5-litre naturally aspirated engine that revs out past 7000rpm and makes 175kW wasn’t exactly humble back in 1990.
Though there were lesser versions of the S14 engine in lesser E30 M3s, the S14B25 that powered the M3 Evo III is the version of the engine that could hold its own today, even nudging the power output of a
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