BMW 118i vs Mercedes-Benz A180

What's the difference?

There was a big kerfuffle a few years back when BMW made the decision to switch its entry-level 1 Series hatchback from a rear-drive platform to a newer, more efficient front-wheel drive architecture, shared with its Mini sister brand.

Despite the concerns of a few enthusiasts and motoring writers, the impact of the change in driven wheels hasn’t harmed the 1 Series’ reputation or sales.

As with the equivalent entry-level small car models from BMW’s premium rivals, the entry grade 118i is an expensive car for what you get.

But does the 118i hatch have enough charm to transcend the price and spec concerns?

Meet the world’s most aerodynamically efficient passenger car. Mercedes-Benz says the drag co-efficient for this new sedan version of its fourth-generation A-Class is the lowest ever measured for a passenger vehicle.

Which is quite a claim, but you only have to look at it to see how much work has gone into marrying good looks with slippery aero performance.

The A-Class sedan is substantially longer and fractionally taller than its hatchback sibling, but does that mean it’s better, or simply different?