Used car hero: Revisiting the E39 BMW M5

It’s a wonderful thing, though, I’m pleased to report. So unlike its modern antecedents in its simplicity, versatility, mechanical authenticity and deep-rooted analogue charm. And yet not unlike them at all in its ability to pin those neat little door mirrors back and then hurl itself into the middle distance at a rate that makes it feel more than contemporary enough, thank you very much. For the avoidance of doubt, some 23 years after it was first introduced, you still don’t need a faster family saloon, I assure you.

Let’s cast our minds back to March 1998 and a certain Geneva motor show unveiling. The world’s defining super-saloon remained the Lotus Carlton. Nothing – save for a few four-door, tuning-house unicorns – had gone close to beating its 377bhp.

Fast saloons still generally had six-cylinder engines, especially those made by BMW. But Munich’s M division E39 lays waste to the rule book. It had an all-new atmospheric 4.9-litre V8 making 394bhp, at a time when the equivalent Audis and Mercedes struggled to top 350bhp. It had a rolling chassis that, by modern standards, actually looks quite ordinary: mainly stock E39 5 Series axles (admittedly with respecified coil springs, dampers, anti-roll bars, mountings and wheel carriers), recirculating ball steering and a mechanical limited-slip differential. Nothing clever.

And yet the appearance of this car was undoubtedly the moment when the gun was fired on a horsepower race that’s been rumbling on among the predominantly German ruling powers of the fast executive car firmament ever since. For better or worse, this was the car that started it all. Like the suspension specification, the car itself looks simple and understated but still darkly purposeful. There are no superfluous carbonfibre aerodynamic addenda, nothing to make you feel like a wally. The perfect, shrink-wrapped, fuselage-like proportions of the E39 are a considerable factor in the car’s visual appeal, it must be said, but the details also help. Our late-model test car, with its ‘corona ring’ headlights (we should probably pick another name for those today, shouldn’t we?) had ice-cool daytime-running lights before DRLs were a thing.

So much about this car appeals simply because it was the daddy of all E39s, itself one of the finest luxury saloons that any car maker has made before or since. It has epic built-in quality. Doors that close with a heftier ‘whump’ than those on a Swiss high-speed train, double-glazed windows and lovely over-engineered details such as the beautiful mechanised ashtray that drops away into the transmission tunnel as you swing its lid closed. They could have just made a deeper ashtray, sure, but that wasn’t how BMW rolled in the celebrated Wolfgang Reitzle era.

M division’s own little touches enrich that cabin just enough: the illuminated gearknob, those supremely clear instruments and two-tone leather upholstery that stretches out so widely and seems to mix immaculate unborn buffalo hide with grumpy, decrepit rhinoceros just for the shock value. Well, it was the 1990s.

Slightly heavy and springy-feeling controls make this car feel alive, connected and immersive to drive, in ways that modern M cars simply no longer can. They like a firm hand and a confident timed input, reminding you of what it’s like to think not just about what you’re doing with your extremities but also how you’re doing it. The car’s manual driveline does that particularly clearly. You’ll often double tap the clutch to give it an easier time, and always match the speed of crankshaft and driveshaft the old-fashioned way on downshifts. Meanwhile, a little out of pure respect, you squeeze both brake and throttle like you’re taking the stone out of an avocado: you never stab away at them like you might in a modern performance car. That’s the biggest difference 20 years make. The V8’s audible presence is surprisingly delicate and reserved at ordinary speeds, but it raises its voice to a brassy, mellifluous yowl beyond 4000rpm. It is always so responsive, though, and the elastic-feeling head of steam it builds on the way to full power on the far side of 6000rpm lives long in the memory.