Press photo of a 2021 BMW X5 M Competition against an illuminated dark backdrop - Torkgaur/ShutterstockAdding an M badge to an already sharp-handling BMW X5 SUV makes it nothing short of a sports car masquerading as a practical family crossover. The 2021 BMW X5 M seats five adults, offers 33.9 cubic feet of cargo room behind the rear seats, and goes from zero to 60 mph in under 4 seconds. It's not as quick as the seventh-generation hybrid BMW M5, but it's not bad for an SUV. The base X5 M has a turbocharged 4.4-liter V8 engine that produces 600 hp and 553 lb-ft of torque. Sending all that oomph to all four wheels is an eight-speed ZF automatic gearbox. Meanwhile, the X5 M Competition has been tuned for 617 hp.The 2021 BMW X5 M is a blindingly fast SUV in any flavor, but it looks like its steep $106,095 MSRP and sky-high maintenance costs have rendered it few favors in terms of resale value. Kelley Blue Book (KBB) has estimated the national average price of a 2021 BMW X5 M at $57,600, which is about 54% of its original MSRP. Edmunds adds that the trade-in value of a 2021 BMW X5 M in "outstanding condition" is around $55,854, which roughly aligns with KBB estimates.However, Car Edge has presented a more conservative estimate of the 2021 X5 M's depreciation. It claims a 44% value drop in 5 years, with resale values hovering at around $71,400 today. Still, the site adds that this estimate applies to units that averaged 13,600 miles a year and are in relatively good shape.AdvertisementAdvertisementRead more: 8 Underrated V8 Engines That Deserve More AttentionThe BMW X5 M's ownership costs are staggeringThe rear 3/4 of a 2021 BMW X5 Competition against a dark background - BMWIf you think the 2021 BMW X5 M's depreciation is alarming, wait until you see its ownership costs. During the first year, owners are expected to lose upwards of $28,000 on fuel, insurance, periodic maintenance, repairs, financing costs, and depreciation, according to Edmunds. The site also estimates that, by the fifth year, owners would have spent $104,281 to keep an X5 M street-legal and running like a champ. The cost and figures could vary, but it goes without saying that owning a premium, high-performance German SUV (and keeping it running) requires deep pockets, even compared to sports cars.For example, the BMW X5 M can't hold a candle to the 2020 BMW M2, which has kept a solid resale value – especially the CS variants. It's the same deal with BMW M4 coupes, which have depreciated far less than the X5 M in the same 5-year window — 35.5% according to iSeeCars. BMW M4 Convertibles, on the other hand, fare worse at 44.8%.On a lighter note, the BMW X5 M is not the quickest-depreciating M car. That distinction goes to the M8 Grand Coupe. According to iSeeCars, the M8 has a 54.4% 5-year depreciation rate. If the trend holds, this grand tourer will have lost 64.9% of its value by year seven and 76.9% by its 10th year on the road. That's quite dreadful for a performance car, but the M8 convertible fares a bit better than the coupe, depreciating 49.7% in 5 years. Moreover, you're better off with the X5 M than the XM plug-in hybrid — a nice-driving EV that looks like a snorting mammal. Car Edge suggests the XM will depreciate 55% after 5 years, while iSeeCars predicts the model will lose 58.1% of its value within 5 years.AdvertisementAdvertisementWant more like this? Join the Jalopnik newsletter to get the latest auto news sent straight to your inbox, and add us as a preferred search source on Google.Read the original article on Jalopnik.