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BMW’s practice of underrating engine power has been a well-known secret. The M4 CSL’s S58 engine is no exception. UK tuning company Evolve Automotive tested it on a dyno. The test reveals the 3.0-litre twin-turbo inline-six’s true capabilities: a factory output of 479 lb-ft (650 Nm) and 543 horsepower.
Evolve Automotive collected data from a previous dyno test of an M3 Competition (G80). This vehicle shares rear-wheel drive with the M4 CSL (G81). It revealed a power output of 529.6 horsepower and 517.6 lb-ft (701 Nm). Surpassing BMW’s official figures by 26.6 horsepower and 38.6 lb-ft (52.3 Nm), offering another pleasant revelation.
Fifty fortunate individuals acquired an M4 boasting an officially higher power rating – the 3.0 CSL, housing BMW’s most potent inline-six to date. The BMW states it has 553 horsepower, but a dyno test will confirm the figure. Due to reliability concerns, torque is electronically limited to 405 lb-ft (550 Nm) because the current Batmobile features a six-speed manual transmission, distinct from the CSL’s eight-speed automatic.
If you’re considering a new M3 or M4, there’s promising news. The upcoming facelift may bring a power boost to the Competition models with xDrive. Presently rated at 503 horsepower, these six-cylinder engines have the potential for a 15 horsepower increase, reaching 518 horsepower. Expect the updated models to debut later this year.
