New, smaller engine has more power and torque than the 6.2 V8 it replaces
1 March 2010

AMG has revealed a new twin-turbo 5.5-litre V8 engine, which will be available in the Mercedes S63 AMG from this summer.

Despite having a smaller capacity than the 6.2-litre V8 it replaces, the new unit, codenamed M157, produces more power and more torque and promises improved fuel efficiency.

A total of 537bhp is produced at 5500rpm (versus 518bhp at 6800rpm in the 6.2 V8) and 590lb ft of torque is also on offer between 2000 and 4500rpm, which is considerably more than the 464lb ft at 5200rpm produced in the current engine.

A 563bhp, 664lb ft version of the engine will also be available as part of a performance package upgrade on the S63 AMG.

The engine weighs 204kg, the twin turbochargers are provided by Garrett and the engine will be mated to Mercedes’ seven-speed MCT transmission, which is also found in the E63 AMG. Fuel consumption in the 5.5 V8 has been improved to 26.9mpg from 19.6mpg in the outgoing 6.2 V8.

The new unit is based on an upcoming Mercedes twin-turbo 4.6-litre V8 engine, which will find its way into the new CLS and S-class models later this year. It’s codenamed M278.

Twitter - follow autocar.co.ukSee all the latest Mercedes reviews, news and video

Join the debate

Comments
5

1 March 2010

AMG's commitment to a non-charged engine didn't last very long, did it?

Big, atmo V8s are becoming extinct. There are good reasons for this, but we should celebrate them while they still exist. The 6.2 V8 in the SLS sounds absolutely delicious.

1 March 2010

27mpg from a twin turbo V8 is impressive. Will the new car will be called the S55?

1 March 2010

[quote C.Schweizer]Will the new car will be called the S55?
[/quote]

That would make sense, at least it'd be more accurate than the current designation.

1 March 2010

"installed at 90 degrees". And upside down as well I expect.

Who wrote this?

1 March 2010

In case anyone thinks I have gone insane, the text did initially say the engine was "installed at 90 degrees"!

Add your comment

Log in or register to post comments

Find an Autocar car review

Driven this week

  • 2017 Volkswagen e-Up review
    First Drive
    24 January 2017
    The VW e-Up is a compelling, if pricey, electric city car but it still requires owners to make some compromises
  • Range Rover SVAutobiography Dynamic
    First Drive
    24 January 2017
    Full-size Range Rover visits SVO to receive JLR's full-fat 542bhp V8 plus chassis revisions, and the result is nothing short of extraordinary
  • 2017 Ford Kuga 2.0 TDCi 180 ST-Line Powershift AWD
    First Drive
    23 January 2017
    A UK drive of the new Ford Kuga proves the latest updates and a new ST-Line trim broaden its appeal, but don't quash the challenge of newer rivals
  • 2017 Tesla Model S P100D
    First Drive
    23 January 2017
    The additional driving range is welcome, but the range-topping Model S's increase in performance is overkill, even if it is very entertaining
  • 2017 Mitsubishi ASX 2.2 DOHC Auto AWD 5 review
    First Drive
    23 January 2017
    Mitsubishi's small SUV is no-nonsense and functional, but still trails its rivals in most areas and this range-topping version looks expensive