Look through the BMW X3 M40d’s numbers and it makes for some good reading if you’re in the market for a fast family hauler. Its 335bhp is nice, but the 516lb ft of torque from 1750rpm is better.

For drivers doing the mileage to justify a diesel, the M40d is certainly the leading performance choice for the X4. The BMW X4 has not been crash-tested by the Euro NCAP safety organisation. However, ...