In many ways, the thinking person's M-car. Where the M3 or M4 demand commitment, this delivers balance. Where a petrol M-car eggs you on to chase the redline, the M340d offers a different kind of satisfaction: endless shove, uncanny refinement, and efficiency that means you can cover ground quickly without stopping for fuel every other day. This example, finished in Black Sapphire Metallic over Vernasca Black leather with grey seam detailing, has the right presence too. It's subtle but purposeful - the sort of car that looks at home in the city, yet equally happy swallowing miles across the country. The specification strengthens that dual-purpose appeal: the M Aerodynamics Package, 19-inch light-alloy wheels, and high-gloss Shadowline trim sharpen the exterior, while red high-gloss M Sport brakes hint at the performance within. The adaptive M chassis and M Sport differential combine with xDrive to deliver remarkable composure in all conditions - the perfect recipe for twisting B-roads or wet motorways alike. Step inside and the M340d blends businesslike restraint with subtle sporting touches. Aluminium tetragon trim, an M leather steering wheel, Anthracite headlining and ambient interior lighting create the right atmosphere, while modern luxuries such as automatic climate control, cruise control with brake function, Apple CarPlay, LED headlights, and DAB cover every practical need. It's a cabin that balances familiarity with a hint of M-car intent - exactly what you want from a car designed to do it all. This 340 has been maintained exclusively by BMW main agents since new, with its iDrive confirming the following: engine oil due 09/26 or in 18,000 miles, brake fluid due 09/26, and vehicle check not required until 09/28. In short, it's on the button, and ready for its next keeper. For the UK buyer who wants performance without compromise, the M340d makes an enormous amount of sense. It has the pace of a junior M-car, the stability of all-wheel drive, the long-range economy of a diesel, and the subtlety of an executive saloon. Few cars manage to juggle those demands so convincingly - and fewer still do it with the polish of a BMW.