Skip advert
Advertisement

New Cadillac CT6 2016 review

The Cadillac CT6 takes aim at the BMW 7 Series and Mercedes S-Class, but is no real match for its luxury German rivals

Overall Auto Express rating

2.0

How we review cars
Find your Cadillac CT6
Compare deals from trusted partners on this car and previous models.
Or are you looking to sell your car?
Value my car
Fast, no-nonsense car selling
Value my car

The CT6 isn’t a bad car, but it will be very hard to justify buying one in the UK. Its price and left-hand drive only availability are the big drawbacks. There’s loads of tech on board and it’s good to drive, but it’s not massively spacious inside and the thirsty petrol engine is paired with a frustrating automatic gearbox. You’ll be far better off with the Mercedes.

Advertisement - Article continues below

The CT6 is Cadillac’s attempt at taking on the German luxury elite made up of the BMW 7 Series and Mercedes S-Class.

Proportionally, it’s a little bigger than an E-Class, but smaller than an S-Class – yet as a top-spec Platinum model, the only version available in the UK, it’s priced to match its larger rival. 

Best luxury cars on sale

It certainly feels just as big as an S-Class from behind the wheel, feeling wide and spacious from the driver’s seat. But if you hop in the back, it feels more like an E-Class – there’s a sufficient amount of legroom, but it’s nowhere near as spacious as the flagship Mercedes

In the UK, where the CT6 is only available from one dealer, in left-hand drive, it needs to be very special from the driver’s seat indeed to have any appeal. You might expect a Cadillac to roll a lot in corners, but the CT6 feels composed while at the same time preserving the smooth ride you’d also expect from the US brand. However it simply can’t touch the S-Class on that front.

Skip advert
Advertisement
Skip advert
Advertisement - Article continues below

Used - available now

Focus

2022 Ford

Focus

13,794 milesManualPetrol1.0L

Cash £18,699
View Focus
Ceed

2019 Kia

Ceed

49,394 milesAutomaticPetrol1.4L

Cash £14,299
View Ceed
5-Door Hatch

2016 MINI

5-Door Hatch

85,624 milesManualPetrol1.2L

Cash £5,599
View 5-Door Hatch
Niro

2018 Kia

Niro

35,490 milesAutomaticPetrol1.6L

Cash £13,699
View Niro

On a performance level, the powerful but smooth 3.0-litre V6 develops 411bhp which is enough to cover 0-62mph in 5.7 seconds. There’s a nice howl from the exhaust as you blast through the rev range, and the in-gear shove is more than enough for a quick overtake thanks to 555Nm of torque.  

Advertisement - Article continues below

Unfortunately the rest of the package lets the CT6 down. The eight-speed automatic gearbox is dim-witted and frustrating to use, in both manual and automatic modes, and the V6 petrol engine isn’t exactly economical, managing just 28.8mpg on average.

Best executive cars on the market

It’s absolutely full of kit though, with all four seats getting a massage function as well as full electric adjustment, heating and cooling. There’s a huge digital display that’s fully configurable behind the wheel, plus a high-res display screen with sat-nav, full smartphone connectivity and a premium Bose stereo. There are built-in screens and a DVD player for rear-seat passengers as well.

There’s a reversing camera too, plus a camera that can be used in place of the rear-view mirror (unfortunately it’s uncomfortable to look at while driving) and a forward-facing night-vision camera. 

Despite the kit, the interior quality can’t compete with its rivals, with cheap-looking carpets and plastics being unacceptable in a car at this price point. The seats are comfortable and the cabin is quiet, but it’s not as pretty as the plush S-Class.

The boot is also smaller than that of a BMW 5 Series, let alone a 7 Series, with just 433 litres in the back. With such shortcomings and such accomplished opposition to compete against, buyers will come away expecting more from a car like the CT6.

Skip advert
Advertisement

More reviews

New & used car deals

Volkswagen Golf

Volkswagen Golf

RRP £24,625Avg. savings £2,989 off RRP*Used from £11,895
Omoda 5

Omoda 5

RRP £23,990Avg. savings £1,949 off RRP*
Skoda Kodiaq

Skoda Kodiaq

RRP £38,140Avg. savings £3,019 off RRP*Used from £11,995
Vauxhall Corsa

Vauxhall Corsa

RRP £19,690Avg. savings £4,794 off RRP*Used from £6,320
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

MG4 and MGS5 EV prices slashed in reply to Government Electric Car Grant
MG4 - rear

MG4 and MGS5 EV prices slashed in reply to Government Electric Car Grant

In order to boost sales, MG is announcing its own a £1,500 grant for some of its EVs
News
21 Jul 2025
Dacia’s baby EV due in 12 months with a tiny £15k price tag
Dacia £15k EV design render

Dacia’s baby EV due in 12 months with a tiny £15k price tag

Dacia's new model will be developed in double-quick time, and it'll be built in Europe to avoid China tariffs
News
24 Jul 2025
Roll over diesel: EVs are now doing the big mileage in the UK
Tesla Model Y - front cornering

Roll over diesel: EVs are now doing the big mileage in the UK

The average UK electric car now covers more than 10,000 miles per year, a similar amount to the average diesel.
News
21 Jul 2025