Larry David, while driving a white 4 Series coupe on Curb Your Enthusiasm, said he doesn't know what his car looks like when he's driving. That's the very idea behind the M2. It's one of the best tools in the business to drive fast and look like a pro. As it did in 2020, the 2021 M2 carries over the nearly-brand-new engine introduced for 2019, a 3.0-liter twin-turbo inline-six borrowed from the M3 and M4. It's an entirely different design from the same-sized, lesser-output engine in the 2016-2018 models, with a dry-sump oil pump and additional radiators that keep it from overheating during extensive track use. The twin-turbocharged engine makes 405 horsepower and 406 lb-ft of torque, routed through rear-wheel drive (RWD), with an electronic locking rear differential that can prevent the onset of wheelspin within 150 milliseconds. The 2020 M2 CS cranks the ponies higher, to 444 hp.
An active limited-slip differential is critical with so much power flooding the back end in a short-wheelbase car. Without so many sensors monitoring steering angle, brake pressure, wheel speed, and yaw, the M2 would roast its tires and rotate about itself just as quickly (and believe us, it did when the stability control was switched to M Dynamic Mode, which lets the driver have more sideways fun).
Unlike our last time with an M2 on a track, we tested the M2 CS with the seven-speed dual-clutch automatic transmission versus the standard six-speed manual. On the track, the automatic is the superior choice. In its most aggressive mode, gear changes are lightning quick and change up only when your foot is completely down to the floor. During hard braking, rev-matched downshifts ensure a smooth corner entry. Only in one uphill esse did the transmission stay in too high of a gear for the corner's recommended speed—and in that case, when you're that experienced on a certain track, selecting manual mode is a sure bet. The real manual is more fun on the street and offers the same rev-matched downshifts, so you're never disrupting the chassis. If you're not tracking an M2, don't order the automatic. You'll be more engaged and appreciate the powertrain's sonorous music—and its sharp crackles if you order the M Performance Exhaust—by shifting yourself.
As with most M models, BMW lets the driver configure the throttle, transmission, steering, and suspension independently of one another. That means if you're driving in Sport mode, the car will accelerate more aggressively but may shift lazier and apply more power steering assist—helpful when you just want to have fun and not race. Because of the dizzying amount of possibilities this invites, BMW usually puts two red toggle presets on the steering wheels of its M models, but oddly, not the M2. So before blazing the circuit or the cul de sac, you'll need to do a preflight check of all your systems.
Steering feel is remarkable and very keen at telling the driver when the front tires are on the fringe of losing traction. On the 2020 BMW M2 CS, those tires are Michelin Pilot Sport Cup 2, some of the stickiest summer tires you can fit to a road car. Our day started on a cold, rain-soaked track with standing puddles. Even in these unideal conditions, the M2 CS was easy to pilot so long as we entered corners slower and accelerated later. As the track warmed and dried, out came the animal. We flew down Monticello's straight at 150 mph—the M2 can reach a top speed of 174 mph with the M Driver's Package—and stomped on the carbon-ceramic brakes that are also unique to the CS. Then it was time to fly over a tight left-right uphill esse, sending two wheels in the air over the curbing, and roar downhill toward the next curve. The poise, balance, and control were stunning.
The same car that's a bit rough on the street is at home on a race track, with impeccable turn-in, minimal body roll, supportive seats, and torque that doesn't quit. The only BMW that felt faster on this circuit was the M5, which accelerates as hard as some Ferraris, but that midsize sedan couldn't stick the tightest corners like the M2. No doubt the CS trim's carbon fiber parts, forged wheels, and carbon brakes help it tear away from bigger, faster cars. BMW hasn't said how much the CS weighs compared to the Competition (3,655 pounds for the automatic), but on a track, every last pound matters.
Every last ounce of gas matters, too, as we pulled into the pits with zero miles remaining on the trip computer. The M2 has a 13.7-gallon tank, and fuel efficiency on the track was likely in the eights. Driven judiciously, the EPA estimates the M2 CS to return 16 mpg city, 23 mpg highway, and 19 mpg combined (the Competition is rated one mpg higher in the city). Strangely, for a modern automatic, the manual versions return higher economy on the CS (17/24/20) and Competition (18/25/20).