Quote:
Originally Posted by AndroidRobot
here you go!
C/D*TEST RESULTS
2019 BMW X5 xDrive50i
• 456-hp twin-turbo V-8, 8-sp auto, 5253 lb, base/as-tested price: $61,695/$92,405
Zero to 60 mph: 4.2 sec
Standing ¼-mile: 12.7 sec @ 109 mph
Braking, 70–0 mph: 158 ft
Roadholding, 300-ft-dia skidpad: 0.87 g
C/D*observed fuel economy: 14 mpg
2019 BMW X5 xDrive40i
•*335-hp turbo inline-6, 8-sp auto, 4872 lb, base/as-tested price: $61,695/$72,530
Zero to 60 mph: 4.9 sec
Zero to 100 mph:*13.2 mph
Standing ¼-mile: 13.6 sec @ 101 mph
Top speed (governor limited): 129 mph
Braking, 70–0 mph: 170 ft
Roadholding, 300-ft-dia skidpad: 0.89 g
C/D*observed fuel economy: 19 mpg
Weight: 4872 lb
even the much heavier 50i stops way sooner thanks to it's big M Sport brakes  so subtract some distance from the M Sport brakes on the 40i
BMW is obviously wrong or asked someone who didn't know. C&D tests are usually very good and I can certainly vouch for the 4.2s 0-60 time on the 50i having tested it myself too |
According to the article the 40i was on all seasons and 50i was on summer tires. This likely accounts for the lower brake distance on the 50i. Disk brakes on most modern passenger vehicles are capable of locking up the wheels on dry pavement, so braking distance is primarily a function of tire traction. BMW is correct that the larger M brakes serve primarily to limit overheating and brake fade (and to look cool).