2026 BMW X3 M50 vs. 2027 Mercedes-AMG GLC53 Comparison TestCar and DriverAndrew WendlerWed, September 23, 2026 at 5:12 PM UTCAdd us on Google2026 BMW X3 M50 vs. 2027 Mercedes-AMG GLC53 Comparison TestMichael Simari - Car and DriverBMW and Mercedes-Benz have been engaged in a vehicular tit-for-tat for as long as most current Car and Driver readers have been alive. While Mercedes-Benz is the elder statesman in this pairing, the rivalry really began to throw off sparks in the 1960s when the BMW 1500 four-door sedan—kidney grilles and debut Hofmeister kink included—arrived as a light, lean, and comparatively modern rival to Benz's W110 series, a stern and stout take on the sedan blueprint that debuted nearly at the same time. Fast-forward some 65 years, and the Teutonic twosome are still trading paint in the sales race across their product lineups.What We TestedThis skirmish pits the BMW X3 M50 xDrive against the Mercedes-AMG GLC53, a pair of compact luxury SUVs that strive to deliver enhanced performance while leaving the baked-in luxury and utility undisturbed. BMW's M performance division fields the X3 M50, while Mercedes-AMG offers up the GLC53.Michael Simari - Car and DriverThe X3 M50 was comprehensively redesigned for 2025 and packs fresh interior and exterior designs, an updated chassis, tweaked powertrains, and modernized infotainment and driver-assist features. (Notably, the M50 replaced the previous M40i for the 2025 model year.) Starting at $67,850, our 2026 X3 M50 had a fair amount of standard equipment, including adaptive suspension, M Sport brakes with painted calipers, a panoramic sunroof, and a heated steering wheel and front seats. In addition, there's the Premium package ($2750; head-up display, curved display, premium Harman/Kardon surround audio, a surround-view camera, and some additional items), the M Sport Professional package ($600; full LED exterior lighting and corner lamps as well as extended Shadowline trim), rear climate controls ($200), and Dune Grey Metallic exterior paint ($650). All in, this X3 M50 costs $72,050.AdvertisementAdvertisementThe GLC53 starts at $71,350, a few grand more than its Munich rival. Also reasonably well equipped, it took a bit more indulgent approach to the options list. While the GLC53 included the panoramic sunroof and heated front seats as standard, we limbered up our box-checking wrist and selected, in descending order of price, a quartet of 21-inch forged cross-spoke AMG wheels ($2850), the AMG Dynamic Plus package ($2000; AMG Dynamic Engine Mounts, AMG electronic rear axle limited-slip differential, red brake calipers), the Driver Assist package ($1950; active driving assists, including lane-keeping and steering assist), black leather with red stitching upholstery ($1620), Starling Blue Metallic paint ($750), AMG Night package ($750; black exterior accents), ventilation for the front thrones ($450), and the Advanced USB package ($300; six fast-charging USB ports and an additional 12-volt power port for the rear passengers).Michael Simari - Car and DriverExclusive to the extensive list above, and somewhat controversially among our crew of test drivers, we selected the Pinnacle Trim ($3900; Burmester 3-D surround sound, heat- and noise-insulating glass, a head-up display, enhanced interior lighting, navigation features, and, crucially, an anti-slip trunk mat). The common thread among our test team was that some of this package—certainly the insulated glass, head-up display, and trunk mat—should be standard on a Mercedes-AMG. As equipped, our GLC53 wore a price tag of $85,920.While all these optional features are welcome, their addition put a $13,870 weight on the GLC53's shoulders before a single wheel was turned. It would really need to turn on the charm to overcome the price discrepancy.Michael Simari - Car and DriverExterior and InteriorLuckily—for the GLC53, anyway—the X3 proudly sports the brand's current polarizing twin-kidney grille design. Taste is subjective, and truthfully, its visual impact has mellowed a bit in the last two years, but it's still a departure from the core design that resonated with the Bimmerista for decades. Blame it on the straight kidney corners where there used to be soft transitions. At least the front end gives it instant identity, as the rest of the exterior is compact-SUV boilerplate: a relatively upright rear hatch, a 112.8-inch wheelbase stretched across 187.2 inches of overall length, and plenty of body surfacing to imbue character.2026 BMW X3 M50 xDriveHIGHS: Attractive price, impressive fuel economy, decent if not segment-beating performance.LOWS: Awkward exterior design, curious interior design choices, lacks the soul of the BMWs.VERDICT: The perennial cool kid still delivers the goods but leans unnecessarily into the quirky zone.AdvertisementAdvertisementThe GLC53 has a modern grille as well, complete with a large star front and center. The profile is a bit more egg-shaped with more rake to the hatchback and fewer creases overall. Its 113.7-inch wheelbase and 187.0-inch overall length don't stray far from the X3's, but to the human eye, the GLC53 appears beefier and more anthropomorphic than the X3.As for the X3's interior, we get that the brand is taking broad swipes at reinvention, but it just tries too hard. The angular design of the door-mounted controls lacks any aha! revelation wherein user functionality is genuinely improved by quirky design. That extends to the rest of the control and infotainment systems too—if you've ever wondered about an answer to the eternal "why be normal?" question plastered across t-shirts, notepads, and self-help-book covers, well, the X3's haptic control panels make a darn good case for going the normal route. That said, it's spacious inside, and the BMW's front seats blend comfort and support even during hard cornering. Its rear compartment offers the most leg- and footroom of the two, and its 32 cubic feet of cargo space behind the second row is 10 more than the GLC's 22 cubes. In terms of carry-on bags, both SUVs swallow eight with all their seats up.Though a tad tighter in nearly every seating position—the large console intruded on right-leg space for some drivers—the GLC53's materials feel a notch higher on the quality index, the overall design doesn't overcook the style recipe, and the infotainment is familiar. Yes, the haptic sliders on the steering wheel are annoying, but the infotainment screen requires only one or two taps to reach a desired menu or function.Powertrain and PerformanceBoth cars rely on an inline-six engine with similar displacement as the core component of their power-making strategy. The X3 M50 kicks things off with a turbocharged 3.0-liter inline-six with a 48-volt hybrid assist system rated at 393 horsepower and 428 pound-feet of torque. Mercedes-AMG also uses a 3.0-liter inline-six with a 48-volt hybrid assist system but adds an electric supercharger to assist the turbo and musters up 443 horsepower and 443 pound-feet of torque, with up to 472 pound-feet available briefly on overboost. That's 50 more horsepower and 15 more pound-feet than the X3 in normal operation.Michael Simari - Car and DriverWhile both cars have all-wheel drive, the BMW relies on an eight-speed automatic transmission, whereas the GLC53 has a nine-speed auto.AdvertisementAdvertisementTo little surprise, the GLC53 dominated the acceleration measures, hitting 60 mph in a very AMG-worthy 3.7 seconds and blasting through the quarter-mile in 12.2 seconds, clearing the traps at 113 mph. Though no slouch itself, the X3 M50 required 4.0 seconds to reach 60 mph and 12.6 seconds to clear the quarter-mile mark at 110 mph. Staying in the throttle to 130 mph widened the gap even further, the GLC53 requiring 17.0 seconds, 4.1 seconds less than the X3 M50's time.2027 Mercedes-AMG GLC53HIGHS: Potent inline-six engine, accurate steering, grip for days.LOWS: Price premium, harsh ride, tight on cargo space.VERDICT: A blue-blood compact luxury SUV with a brawny brawler powertrain.Acceleration testing reached its conclusion at that point, as the BMW is electronically limited to a top speed of 130 mph, whereas the AMG, in an act of selfish one-upmanship, happily continued to 150 mph in a grand total of 26.2 seconds; Mercedes-AMG says it's good for 167 mph before the electro-nanny steps in to ruin the fun.Michael Simari - Car and DriverThe GLC53 continued its dynamic dominance in nearly every other metric, hauling to a stop from 70 mph in 147 feet; the X3 M50 required 166 feet to do the same. Stopping from 100 yielded even a wider gap, the GLC53 consuming 294 feet while the X3 M50 stretched out to 352 feet. Grip, too, fell to the GLC53's favor, its 0.94-g result easily topping the X3 M50's 0.85 g.AdvertisementAdvertisementThe X3 M50 did reign supreme in fuel economy, however, returning a respectable 28 mpg over 400 miles of testing across numerous driving environments; the GLC53 returned just 23 mpg over the same route.Driving ExperienceThe X3 M50's powertrain hit all the right notes, both sonically and dynamically, and its front strut and rear multilink suspension and Pirelli P Zero all-season tires (255/45-20 front and 285/40-20 rear) helped it traverse our handling loop competently. Ham-fisted mid-corner corrections were handled with welcome grace, but feedback is nonexistent, so dicey maneuvers require some faith from the driver. And with full torque available from its well-tuned powertrain at a low 1900 rpm, you'll never be caught looking at your watch waiting for thrust.The GLC53 takes a more extroverted approach, its massive Michelin Pilot Sport 4 SUV tires (265/40ZR-21 front and 295/35ZR-21 rear) providing oodles of grip while resisting the urge to tramline. Its four-link front suspension and wide Michelins somehow manage all that grip without much tramlining. The AMG also benefits from rear-wheel steering, which encourages turn-in and helps shrink its footprint in tight confines. Likewise, its extra power helps offset its additional weight. (The GLC53's 4669-pound curb weight is 195 pounds heavier than the 4474-pound X3.)Both deliver smooth and quiet freeway driving experiences and serve dutifully when pressed into daily-driver mode—until you encounter broken pavement or swollen expansion joints. Both SUVs take these types of hits on the chin, transferring some of the impact and all the sonic shock into the cabin. In that measure, they are near equals.Michael Simari - Car and DriverAnd the Winner Is . . .Based on the performance metrics alone, it's obvious the GLC53 is the more muscular option. But their differences extend far beyond raw data. Whereas the X3 M50 is plenty capable, it performs with grace but lacks that seemingly clairvoyant call-and-response relationship between the driver and chassis that defines our favorite vehicles.AdvertisementAdvertisementThe GLC53 has a far less complicated personality. It's up for a good time anytime, a linebacker with inexplicable speed and agility. Even better, it likes to share the fun with the driver, constantly nudging them to engage and explore the car's limits. And when it comes time to settle down, the Merc is nearly as aloof as the BMW when running errands or mowing through highway miles. It's that combination of qualities that more than makes up for the AMG's price premium. Therefore, this round of the storied Teutonic rivalry goes to the Mercedes-AMG GLC53.➡️ Skip the lot. Let Car and Driver help you find your next car.Shop New Cars Shop Used CarsYou Might Also LikeGift Guide: Best Ride-On Electric Cars for KidsFuture Cars Worth Waiting For: 2025–2029
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