BMW M is celebrating its 50th anniversary this year and we can’t think of a better way to mark this occasion than to announce a new M4 CSL (Competition Sport Lightweight). Although the M3 Competition already packs a healthy 503 horsepower, the CSL tackles another 40 and at the same time drops 240 pounds from its carb weight. BMW says it makes the 2023 BMW M4 CSL the fastest production BMW to lap Nordscliff, at 7: 20.2.
The 543 horsepower is impressive enough for a compact sport sedan, but the 240-pound diet from the already-beautiful competition model is the real eye-catcher here. The CSL weighs just 3,640 pounds. It had to carry 20% more weight than the E46 M3 CSL (the pioneer of carbon fiber roofing in BMW M cars). The good thing is the M4 packs 50% more power – enough to run it electrically at a limited speed of 191-mph at a maximum speed of 0 to 60 miles per hour in 3.6 seconds. It’s actually 2/10th slower than BMW’s own figure for the M4 Competition xDrive, which checks in at 3,979 pounds. All-wheel drive counts for many outside the line.
Although the CSL gets more power, the peak engine torque remains at 479 lb-ft. Forty of CSL’s bonus horses come from an additional 5.8 pound boost (30.5 psi for total) and re-calibrated engine management for high-RPM power delivery. There is also a new set of lightweight (Go Figure) titanium extrusion and firm-up engine mounts that will improve both feedback and feedback. Some extreme measures were needed to get an all-American out of the M4, where BMW halved the number of seats available in the name of mass reduction. In the back seat, you’ll find a simple small helmet storage QUBE and with cargo net.
While this is one of the most obvious discounts on M4 CSL carb weight loss, it’s certainly not the whole story. The hood, roof and trunk lid of CSL are all carbon fiber, like the rest of the bucket seats. These ornate thrones for 53 of the 240 lb BMW shave off the carb weight of the competition. Lightweight and under-used sound insulation saves 33 more; Its lighter wheels, carbon ceramic brakes and forged chassis components also contributed 46 more. Think we’re joking?
“The model-specific, weight-minimized BMW Kidney Grill has a more minimal design than the standard M4, with less slats and a wider space between them to optimize airflow in radiators,” BMW said in a statement. “The unique grille features red contour lines and ‘M4 CSL’ badges.”
Unfortunately for BMW, Road Test Editor Jack Palmer – AutoblogHardcore keeper of BMW’s recent nose job – too busy playing with other great cars to speak for BMW’s design team – our internal vote unanimously presented: it’s still ugly. The carbon trunk lid looks at least good, and BMW says the integrated spoiler produces “significant” rear-axle downforce.
The CSL sits lower than the standard M4 competition and gets its own adaptive M suspension tune for its lower weight. Springs were installed both front and rear to help keep the strong primary springs in place when the suspension was completely dropped, making the 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. The CSL package includes a set of Michelin Pilot Sport Cup 2 R tires 275 / 35ZR19 front and 285 / 30ZR20 rear.
The 2023 BMW M4 CSL will be a sticker for $ 140,895 when it goes on sale later this year, but we expect the real-world transaction price to be much higher than that. Production will begin in July and will be limited to just 1,000 units. Good luck.