2021–2026 Alpina X4 XD4 Specs & Performance

The 2021–2026 ALPINA X4 XD4 is an unusual performance crossover because its character comes from a high-output diesel rather than a conventional petrol performance engine. ALPINA retained the quad-turbocharged 3.0-liter inline-six diesel concept while updating the XD4 for the facelift, giving it an impressive 394 PS and 800 Nm of torque.

That enormous torque figure is central to the XD4's personality. It delivers the effortless thrust expected from a performance ALPINA while remaining suited to long-distance driving, and the eight-speed Switch-Tronic automatic and all-wheel-drive system put that power down with little drama. A 0–100 km/h time of 4.6 seconds makes the XD4 genuinely quick, but its appeal goes beyond acceleration. ALPINA's chassis calibration turns the X4's practical crossover format into something much more focused, creating a rare combination of diesel efficiency, everyday usability, and serious performance. It is this unusual formula—not simply the headline power—that makes the XD4 one of the more distinctive ALPINA models.