2018 BMW M5 vs Alpina B5 - 5 Series super-saloon showdown | Autocar

The BMW M5 is typically the benchmark big German superslaoon. Its twin-turbocharged engine makes all but 600bhp these days, and drives all four wheels of the hottest BMW 5-Series, to make it a crushingly capable sedan.
But, as Yoda once said: there is another. Alpina is an independent manufacturer and valued customer of BMW, and as soon as an M-car is on the horizon, so too is the Alpina version. This is the B5, equal on power with the M5 and also employing four-wheel drive, but with a very different, rather smoother and more discreet way of going about, ultimately, the same job.
Which is the best at it? We head to the overcast roads of Wales to find which of these two out-übers the other.
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