Just dropping my final update on the M340i—it was sold a few weeks back to a close friend.
Honestly, I didn’t want to let it go. It was the perfect mix: a solid family car that could still rip a quick quarter mile.
The car was bench tuned by Xcede Performance. With a pump file map, downpipe, and E30 fuel, it pushed a reliable 336kW at the wheels and 700Nm of torque. Later on, we added Stage 3 XHP, and that completely changed the game.
We did a few runs at Rhino Airfield during a private event and it clocked a respectable 11.6s quarter mile—on stock Bridgestone runflats (rear tires were nearly done) and no prep surface. I genuinely think it’s capable of even better times, especially if the new owner throws in a meth kit and some Michelin PS4s.
Final thoughts on the G20 M340i:
If you want one car that does it all—daily drives, road trips, track days—this is it. It’s practical, comfy, luxurious, and has a beautifully balanced driving feel. The xDrive system (rear-biased in Sport+) paired with adaptive suspension makes it super engaging. And surprisingly, it’s really good on fuel too.
Get yourself one! No real downsides, apart from what’s already been mentioned earlier in the thread.
Final pics below 👇
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