2023 BMW M4 CSL: more power, less weight, fewer seats, smaller grille (OK, just slightly smaller):
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 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.
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 and recalibrated engine management for higher-RPM power delivery. There's also a lightweight titanium exhaust and a new set of firmed-up engine mounts that should improve both response and feedback.
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 ceramicand forged chassis components contributed another 46.
"The model-specific, weight-minimized BMW kidney grille has a more minimalist design than on the standard M4, with fewer slats and wide spaces between them optimizing airflow to the radiators," BMW's announcement said."The unique grille features red contour lines and 'M4 CSL' badging.
The CSL sits lower than the standard M4 Competition and gets its own Adaptive M Suspension tune to account for its reduced weight. Helper springs were installed both front and rear to keep the firm primary springs in place when the suspension is in full droop, making dynamic transitions more linear and predictable. Rubber control arm mounts on the rear subframe were also replaced with ball joints to reduce compliance and improve damper response.
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