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Mercedes-AMG Unveils Atomic V8 Engine

By Motoring Channel Staff - 13/7/2005

Mercedes-AMG 6.2-litre V8 Engine
Mercedes-AMG 6.2-litre V8 Engine

Nat Atmo V8 Race Pace

There are few naturally aspirated V8s that can touch AMG's shiny new donk for power output, but one of them is General Motor's LS7 V8.

This rather large 7.0-litre engine outputs slightly less power than the new German-built AMG mill - 373kW vs 375kW - but the American Chevrolet engine churns out more torque, about 27Nm more.

When you compare engine capacity though - AMG's 6.2-litre vs GM's 7.0-litres - it shows just how much work Mercedes and AMG have put into its new engine range. And just imagine what a pair of turbochargers could do to the new Merc V8...

Merc's new V8 engine will see widespread service, from the R-Class people mover to the large E-Class saloon and estate models.

- Feann Torr, Editor

Mercedes-AMG has taken a completely new departure: the new AMG 6.2-litre V8 engine is the first in the world to combine the high-revving concept with a large displacement.

Developed entirely by AMG, this high-performance engine has a displacement of 6.2-litres and generates an output of 375kW (510hp) @ 6800rpm, plus a maximum torque of 630 Newton metres, which makes the new power pack by AMG the world's most powerful naturally aspirated 8-cylinder production engine.

Thanks to its large displacement, the V8 by AMG develops around 20 percent more torque than comparable naturally aspirated engines in this performance class.

Made completely from high-strength aluminium, this naturally aspirated V8 engine has a wealth of exciting features derived from motorsport, and impressively documents the successful motor racing history of AMG.

Together with a variable intake manifold featuring two integral throttle flaps, the vertical arrangement of the intake and exhaust ducts ensures perfect cylinder charging.

Bucket tappets in the cylinder heads allow a stiff valve train and therefore high engine speeds. Variable camshaft adjustment, a particularly rigid closed-deck crankcase and cylinder walls with a new, revolutionary LDS coating are further attributes of this ultra-modern V8 engine made by Mercedes-AMG.

The high expectations of AMG customers and the impressive history of AMG 8-cylinder engines were both an incentive and an obligation for the engineers and product planners at Mercedes-AMG GmbH to come up with a superlative new V8 power unit.

A mere glance at the key technical data shows that this has been achieved: from a displacement of 6208 cubic centimetres, the AMG V8 aluminium engine develops a peak output 375kW/510hp @ 6800rpm and a maximum torque of 630Nm which is available from 5200rpm. The maximum engine speed is 7200rpm.

AMG 6.2-litre V8 Specifications:

Displacement: 6208 cc
Bore/stroke: 102.2/94.6 mm
Compression ratio: 11.3 : 1
Max. power: 375kW @ 6800rpm
Max. torque: 630Nm @ 5200rpm

This unique combination of a fast-running concept and a large displacement achieves the best of both worlds: exhilarating flexibility accompanied by high torque at low engine speeds. The driver experiences the decidedly sporty character of the engine in the form of great agility and dynamic responsiveness in all engine speed ranges.

The new AMG V8 already delivers 500Nm to the crankshaft @ 2000rpm, while the maximum of 630Nm is on tap at 5200 rpm – more than any other naturally aspirated engine in this output and displacement class. In short, the new AMG 8-cylinder guarantees dynamic acceleration, rapid intermediate sprints and sheer driving pleasure at the highest level.

In design terms the new 8-cylinder engine by Mercedes-AMG is the first completely autonomous development to have no features or shared parts whatsoever in common with other 8-cylinder units by Mercedes-Benz. The new 6.2-litre unit differs from the other AMG V8 engines based on Mercedes designs in the distance between cylinders, the crankcase concept, the sophisticated intake and exhaust manifolds and the valve train; the bore/stroke ratio is also a completely new departure for Mercedes-AMG.

The new powerplant is produced at the ultramodern AMG engine workshops, according to the "one man, one engine" philosophy. This means that a single technician assembles the complete engine by hand – and as witness his signature appears on the engine's AMG badge.

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