Audi A7 Sportback vs BMW 6 Series GT vs Mercedes CLS

Mercedes-Benz set the trend for four-door coupés with the original CLS. Does the latest model continue to lead the way ahead of its German rivals?...

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What Car? team
01 March 2019

Mercedes CLS leading Audi A7 and BMW 6 Series GT

Our verdict

This market usually values style over practicality; we know that. But we don’t dish out points for looks; that’s for you to decide. We do, however, accept that the BMW 6 Series GT looks kooky to many people; our Twitter desirability poll proved that, with it receiving the lowest number of votes.

But even if you were to ignore space and practicality completely, the 6 GT still racks up the most stars, including in key areas such as infotainment, costs and equipment. Factor in the huge boot and lounge-like rear seating and it simply wins by a bigger margin.

If the 6 GT still isn’t for you (and we’d understand why), the Audi A7 Sportback is your best bet, due in part to its exquisitely made interior and superb long-distance cruising credentials. The Mercedes CLS is close behind, though, and thanks to its seriously impressive diesel engine, tidy handling and cocooning interior, it’s the most appealing for those looking for something a little more sporty.

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1st – BMW 6 Series GT

BMW 6 Series GT rear

For Brilliant infotainment; cheap in this company; very practical; high-quality interior

Against Stodgy handling; divisive styling

Recommended options Two-axle air suspension (£1670); adjustable lumbar support (£275)

What Car? rating 4/5

Read our full BMW 6 Series Gran Turismo review

Find a great BMW 6 Series Gran Turismo deal


2nd – Audi A7 Sportback

Audi A7 Sportback rear

For Classy interior; smooth high-speed ride on optional air suspension; practical boot

Against Annoying gearbox; so-so infotainment; poor rear space

Recommended options Adaptive air suspension (£2000); increased fuel tank (£110)

What Car? rating 3/5

Read our full Audi A7 Sportback review

Find a great Audi A7 Sportback deal


3rd – Mercedes CLS

Mercedes CLS rear

For One of the best diesel engines in the world; enjoyable handling; eye-catching interior

Against Ride is firm and there’s road and suspension noise; cramped rear space

Recommended options Premium Plus Pack (£3895)

What Car? rating 3/5

Read our full Mercedes-Benz CLS review

Find a great Mercedes-Benz CLS deal


Specifications: Audi A7 Sportback 50 TDI quattro S Line

  • Engine size 6cyl, 2967cc, diesel
  • List price £58,155
  • Target Price £51,320
  • Power 282bhp @ 3500-4000rpm
  • Torque 457Ib ft @ 2250-3000rpm
  • Gearbox 8-spd automatic
  • 0-60mph 6.1sec
  • Top speed 155mph
  • Gov't fuel economy 48.7mpg
  • CO2 emissions 150g/km

Specifications: BMW 6 Series GT 630d M Sport

  • Engine size 4cyl, 1618cc, turbo, petrol
  • List price £55,825
  • Target Price £49,371
  • Power 261bhp @ 4000rpm
  • Torque 457Ib ft @ 2000rpm
  • Gearbox 8-spd automatic
  • 0-60mph 6.0sec
  • Top speed 155mph
  • Gov't fuel economy 49.5mpg
  • CO2 emissions 150g/km

Specifications: Mercedes CLS 400d 4Matic AMG Line

  • Engine size 6cyl, 2925cc, diesel
  • List price £61,215
  • Target Price £56,591
  • Power 335bhp @ 4400rpm
  • Torque 516Ib ft @ 1200-3200rpm
  • Gearbox 9-spd automatic
  • 0-60mph 5.0sec
  • Top speed 155mph
  • Gov't fuel economy 47.9mpg
  • CO2 emissions 156g/km

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