Audi A7 Sportback vs BMW 6 Series GT vs Mercedes CLS

Space and practicality

Front space, rear space, seating flexibility, boot

Each of our test cars came with a head room-reducing sunroof (standard in the 6 GT, optional in the A7 and CLS). You barely notice its effect in the 6 GT, but in the lower-slung CLS and A7, those over 6ft tall will feel more hemmed in for height. At least front leg room is plentiful across the board.

It’s in the rear that the differences really tell. The CLS and A7 are wide enough only for two adults, and while there’s reasonable leg room for six-footers, again, head room is tight. The 6 GT is massive by comparison, with plenty of head room and more knee room than you’ll find in the 5 Series, so you can really stretch out.

It’s wider, too, so it can easily seat three abreast when required, while the optional (£420) electric reclining rear backrests make it feel more akin to a limo than a stylised coupé.

The 6 GT also has the biggest boot, capable of swallowing up to nine carry-on suitcases. Mind you, the A7 managed eight cases and the CLS a still praiseworthy seven, although being the only one with a saloon-style boot-lid (rather than a hatchback tailgate), it struggles to accept bulkier items. All three cars have 40/20/40 split-folding rear seats for added flexibility.

Audi A7 Sportback

Boot 535-1390 litres Suitcases 8

BMW 6 Series GT

Boot 610-1800 litres Suitcases 9

Mercedes CLS

Boot 520 litres Suitcases 7

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