BMW 5 Series vs BMW Alpina B5

What's the difference?

More than half a century of 5 Series pedigree has led BMW to this, the first electric version of its venerable sedan, the i5. 

It's true that electric cars come with benefits that suit the realm of luxury (or at least executive) motoring like their effortless acceleration and near-silent operation, so this new G60 5 Series has the potential to be the best yet in its ‘i5’ form.

But there are rivals, well-liked ones at that, which BMW must contend with to snatch the spot at the top of the large premium sedan ladder technically held currently by the Porsche Taycan in terms of sales - though Mercedes’ E-Class would lead if its electric cousin EQE’s sales were combined.

So, with names like that to go up against, BMW better have brought its A-game.

The BMW Alpina B5 Bi-Turbo is not actually a BMW. Not according to the German Federal Motor Transport Authority, at least.

Nope, the modifications applied by tuning house Alpina to the 5 Series are deemed so significant that if you open the bonnet and look inside the engine bay, you'll see that the BMW VIN has been struck through twice and an Alpina vehicle number stamped underneath it. 

The B5 is not the first model to be recognised in this way, either; the German government has recognised Alpina as a seperate car manufacturer since 1983.

The B5 has other ‘B' siblings, too. There's the B3 S Bi-Turbo, which is based on the BMW 3 Series, the B4 S Bi-Turbo (the BMW 4 Series) and the B7 Bi-Turbo (I don't need to tell you what this is based on, right?) which I've reviewed, too.

So just what has Alpina done to this unsuspecting BMW 5 Series? Is it really worth the extra money? How does the B5 compare to an M5? Could it actually be superior? And did they really take the speed limiter off to let it warp-speed to beyond 300km/h?