3 Minutes
Hidden Beast: the 2020 BMW M340i That Outspeeds Supercars
A heavily modified 2020 BMW M340i (G20) just rewrote expectations for what a compact executive sedan can do. What looks like a relatively modest 3 Series on the outside is, according to Dragy Motorsports' data, producing a staggering 1,375 horsepower and tipping the scales at about 3,290 lb (1,492 kg). That combination turned this sleeper into a genuine supercar contender on the quarter-mile.
From factory performer to tuned monster
The G20 M340i left the factory with BMW's twin-turbo 3.0-liter inline-six, rated at roughly 382 hp and 369 lb-ft of torque, good for a 0-62 mph (0-100 km/h) time near 4.6 seconds. By contrast, the standard M3 jumps to around 473 hp, and the Alpina B3 sits slightly above the stock M340i. But this particular example has been taken far beyond OEM limits: a 3.2-liter stroker engine, new turbos, and a suite of supporting upgrades have multiplied its performance to hypercar levels.
Verified drag numbers that shock
Dragy’s run sheet for this M340i reads like a hypercar spec sheet:
- 60 feet: 1.46 seconds
- 0-60 mph (0-97 kph): 2.37 seconds
- 0-130 mph (0-209 kph): 3.24 seconds
- Standing 1/8-mile: 5.79 seconds @ 134.25 mph (216.05 kph)
- 100-150 mph (161-241 kph): 2.96 seconds
- 1,000 feet: 7.36 seconds @ 156.69 mph (252.5 kph)
- 1/4-mile: 8.67 seconds @ 171.86 mph (276.6 kph)
These figures put the M340i ahead of some purpose-built drag cars and even faster than the Dodge Challenger SRT Demon 170 in quarter-mile pace. It also outguns the original Bugatti Veyron in peak power, underlining how far tuning technology has come for turbocharged six-cylinder platforms.
How does it launch so effectively?
A 1,375-hp sedan launching to 60 feet in 1.46 seconds suggests excellent traction management, likely a combination of sticky tires, optimized clutch or transmission calibration, and precise engine tuning to manage wheelspin. The result is brutal, linear acceleration that keeps pulling well past triple-digit speeds — exactly what the 100–150 mph split confirms.
Why this matters to the tuning world and buyers
There are two takeaways. First, modern turbocharged engines, when given the right displacement, turbochargers, fueling, and tuning, can deliver power levels once reserved for multimillion-dollar hypercars. Second, the sleeper aesthetic — minimal exterior changes — makes this type of build appealing to enthusiasts who want jaw-dropping performance without a show car look.
For buyers and gearheads, the M340i platform represents value: a refined chassis, competent factory electronics, and wide aftermarket support. That makes it an ideal base for high-output builds that remain relatively livable for street use.
Highlights
- Platform: 2020 BMW M340i (G20)
- Engine: Modified 3.2L stroker inline-six with new turbos
- Measured power (Dragy data): approximately 1,375 hp
- Quarter-mile: 8.67 seconds at 171.86 mph
Whether you call it a sleeper, wolf in sheep’s clothing, or outright anomaly, this M340i showcases the extremes of modern tuning. Check out the run if you want to see a G20 that turns everyday looks into extraordinary speed.
Source: autoevolution
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