The 2025 BMW X3 M50 xDrive might seem like a natural evolution of the 2024 X3 M40i, but its secret weapon ... where the small electric motor assists the engine during acceleration and coasting ...

Because the X3 M40i isn’t from the actual M division, it doesn’t get a proper M engine. Instead, the M40i is fitted with BMW’s latest 3-litre straight-six, the B58. It’s the same engine ...

We’ve already driven the performance variant of the new BMW X3, the M40i, but this is our first ... s 2-litre turbocharged four-cylinder diesel engine, while the X3 30d packs a 3-litre inline ...