Yahoo Autos 2023 BMW M4 CSL: more power, less weight, fewer seats, smaller grille
BMW M is celebrating its 50th anniversary this year and we can't think of a better way to mark the occasion than the announcement of a new M4 CSL (Competition Sport Lightweight). While the M3 Competition already packs a healthy 503 horsepower, the CSL tacks on 40 more while simultaneously stripping 240 pounds from the its curb weight. BMW says this makes the 2023 BMW M4 CSL the fastest production BMW to ever lap the Nordschleife, doing so in 7:20.2.
543 horsepower is plenty impressive for a compact sport sedan, but the 240-pound diet from the already-svelte Competition model is the real eye-catcher here. The CSL weighs just 3,640 pounds. That's 20% more weight than the E46 M3 CSL (which pioneered the carbon fiber roof in production BMW M cars) had to carry around. Good thing the M4 packs 50% more power — enough to propel it from 0 to 60 mph in 3.6 seconds on its way to an electronically limited 191-mph top speed. That's actually 2/10ths slower to 60 than BMW's own figure for the M4 Competition xDrive, which checks in at 3,979 pounds. All-wheel drive counts for a lot off the line.
While the CSL gets more power, peak engine torque remains at 479 pound-feet. The CSL's forty bonus horses come from an additional 5.8 pounds of boost (for 30.5 psi total) and recalibrated engine management for higher-RPM power delivery. There's also a lightweight (go figure) titanium exhaust and a new set of firmed-up engine mounts that should improve both response and feedback. Pulling an entire American out of the M4 required somewhat extreme measures, to the point where BMW halved the amount of available seating in the name of reducing mass. In place of the rear seats, you get a handy little helmet storage cubby and accompanying cargo net.
While that's one of the M4 CSL's most obvious concession to lowering curb weight, it certainly isn't the whole story. The CSL's hood, roof and trunk lid are all carbon fiber, as are the remaining bucket seats. Those shapely thrones account for 53 of the 240 pounds BMW shaved off the Competition's curb weight. Lighter-weight and more sparingly used sound insulation saved another 33; its lighter wheels, carbon ceramic brakes and forged chassis components contributed another 46. BMW even slimmed down the grille. Think we're joking?
