BMW Showdown: M340i vs M850i – The Drag Race That Left Gearheads Speechless
In the world of BMW enthusiasts, nothing stirs the soul quite like a head-to-head comparison of two powerful machines. Even though the BMW M340i and M850i aren't true M cars, being part of BMW's M Performance lineup still means they pack a punch. Both cars were put to the test on a runway by CSL AutoTime of Thailand, providing us with an unfiltered look at their capabilities. Spoiler alert: the M850i xDrive emerged victorious.
The Powerhouses Unveiled
Under the hood of the M340i xDrive lies a 3.0-liter inline-six turbo engine, delivering 374 horsepower and 369 lb-ft of torque. Meanwhile, the M850i xDrive boasts a 4.4-liter twin-turbo V8 that churns out a staggering 523 horsepower and 553 lb-ft of torque. With such impressive figures, it seems almost inevitable that the M850i would dominate. But as any true car aficionado knows, spec sheets only tell part of the story.
Real-World Performance
During the quarter-mile drag race, the M850i clocked an impressive 11.94 seconds at 187 km/h (116 mph). The M340i, less powerful on paper, still managed a respectable 12.66 seconds at 175 km/h (109 mph). What makes these figures particularly noteworthy is that they were achieved on a runway, not a specialized drag strip. This real-world setting adds a layer of credibility to the performance metrics of both vehicles.
Despite its heavier weight (1,890 kg or 4,167 lbs), the M850i's superior power and torque allowed it to outperform the M340i, which weighs in at 1,670 kg (3,682 lbs). The additional weight of the M850i, however, is offset by its more potent engine and advanced aerodynamics.
More Than Just Numbers
When it comes to sheer straight-line speed, the M850i has a clear advantage. But let's not overlook the M340i's agility and handling prowess, qualities that make it a terrific option for those who relish spirited driving on twisty roads. Both vehicles have their top speeds electronically limited to 250 km/h (155 mph), a common feature in many high-performance models to ensure safety and longevity.
Technological Sophistication
The current generation of the 8 Series, known as the G15, replaced the older 6 Series and serves as BMW’s flagship coupe. The M850i features the older N63 twin-turbo V8 engine, as opposed to the newer S68 engine found in the facelifted X7 M60i. The S68 offers electrification, including a 48-volt starter generator, making it a more efficient and advanced option.
On the other hand, the M340i benefits from BMW's latest technology, such as the 48-volt mild-hybrid system that enhances both performance and fuel efficiency. This technology is also available in the 2.0-liter turbocharged 330i.
The Luxury of Choice
In the U.S., the 2025 BMW M850i xDrive Coupe starts at a hefty $106,300. The M340i Sedan, while less exclusive, still commands a significant price tag with MSRPs starting at $57,600 for the rear-wheel-drive version and $59,600 for the all-wheel-drive variant. Both vehicles feature BMW's xDrive system, which uses an electronically controlled multi-disc clutch to continuously distribute torque between the front and rear wheels.
Conclusion
In the end, whether you choose the M340i or the M850i depends on what you value most in a car. If raw power and speed are your priorities, the M850i xDrive is the clear winner. However, if you appreciate agility, advanced technology, and a slightly more accessible price point, the M340i xDrive offers a compelling package. Either way, both cars embody BMW's commitment to performance, luxury, and driving pleasure.