Used BMW 6 Series for sale near Greenock

CarGurus expert rating: 3 out of 5
CarGurus user rating: 4.8 out of 5
Percentage of good/great deals available on CarGurus: 34.1%
Overall CarGurus rating:* 4.2 out of 5
Available Listings: Around 170
Average Price: Around £14,600

BMW 6 Series Gran Turismo (2018-2020) Pros and Cons

Pros	Cons
An interesting alternative to a conventional executive car	The xDrive 4x4 versions cost more to fuel than two-wheel-drive models
The hatchback layout is practical and there's plenty of luggage space	Not as compelling to drive as a BMW 5 Series
Four-wheel drive is available with some engines	Divisive looks may put you off

Quick Summary

The BMW 6 Series Gran Turismo (2018-2020) is a large and practical executive car that blends tried-and-tested BMW underpinnings with a bigger coupe-like body and a practical hatchback layout. More spacious, practical, advanced and efficient than its predecessor, it offers 610 litres of boot space with rear seats up and 1,800 litres with them folded down. The powered tailgate and flat boot floor make loading straightforward. Available with a choice of 2.0-litre four-cylinder and 3.0-litre six-cylinder petrol engines, plus diesel options, all paired with an eight-speed automatic gearbox, the 6 Series GT delivers comfort and pace in a premium package.

However, whilst the engine line-up is excellent and the car is well equipped and luxurious, it's a big, heavy and uncommunicative machine that doesn't deliver compelling handling. The divisive styling may also deter some buyers. The 630d achieves around 50mpg in real-world conditions, whilst the 640i xDrive manages close to 30mpg. Running costs are reasonable for a premium executive car, though VED premiums apply for the first five years. Despite its drawbacks, the 6 Series GT makes sense for those prioritising comfort, space and relaxation over dynamic driving engagement.

Best for: Buyers seeking a large, practical and relaxing luxury executive car with excellent interior space and a hatchback layout, and those wanting an interesting alternative to conventional saloons.

Not ideal for: Drivers prioritising engaging handling, those who dislike its distinctive styling, or buyers seeking a more dynamic driving experience comparable to a BMW 5 Series.


Comparison vs Key Rivals



The Verdict

You should buy the 6 Series Gran Turismo if: You're seeking a large, practical and relaxing luxury executive car with excellent interior space and a hatchback layout, or wanting an interesting alternative to conventional saloons.

Consider alternatives if: You prioritise engaging handling, dislike its distinctive styling, or require a more dynamic driving experience comparable to a BMW 5 Series.

Competitive Position: The BMW 6 Series Gran Turismo (2018-2020) is a distinctive choice in the luxury executive segment, offering unquestionable comfort, accommodation and practicality. Whilst rivals such as the Mercedes-Benz CLS and Porsche Panamera deliver more compelling driving dynamics and sleeker styling, the 6 Series GT excels in space and versatility. The Tesla Model S offers cutting-edge technology and performance, but at a premium price. For buyers prioritising relaxation, practicality and a unique alternative to conventional saloons, the 6 Series Gran Turismo remains a sensible choice, especially as depreciation has made used examples more accessible.

Read our full BMW 6 Series Gran Turismo Review

*The Overall CarGurus rating: that informs these recommendations is based on CarGurus' proprietary market data from March 2026, CarGurus expert reviews, and CarGurus user reviews.