Farewell Turbo Lag

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360 HP - 450 Nm - 270 km/h

The engine performance of the AMG A45, the smallest AMG with its 2-liter, 4-cylinder turbocharged engine is truly something to write home about. With a specific performance of 133 kW/l (181 HP), it boasts a specific power that bests some of the strongest super sport cars, while complying with the EURO-6 standard.

Clearly, there is more than enough power, despite – or thanks to – the extreme downsizing concept. So what happens when the most innovative development service provider takes on the strongest series 4-cylinder turbo engine in the world?

The keyword is series-compatible electrification – more specifically, 48-volt e-charging. In the AMG A45 concept vehicle, FEV engineers have installed an additional e-charger. The electronically operated unit supports the twin-scroll turbocharger, optimized for maximum performance at low speed and highly dynamic load changes. The maximum torque of 450 Nm is already available early in the speed range at 1,600 rpm – which is 650 rpm earlier than in the series version.

Experience the Difference

The result: the elasticity and the responsiveness of the already very sporty AMG A45 considerably increase and the number of gear changes can be minimized. As an example, the acceleration from 80 to 120 km/h improves – depending on the selected gear – up to 40 percent.

Without eC 5.2 s 7.0 s 12.1 s 20.1 s
4th gear 5th gear 6th gear 7th gear
With eC 4.8 s 6.0 s 8.5 s 11.4 s
Acceleration from 80 to 120 km/h.

Forward-Looking Concept

The use of an additional 48-volt e-charger ensures increased driving comfort, especially for luxury class vehicles, which are increasingly offered with 4- and 6-cylinder engines. The boosting of downsizing engines is always a compromise between responsiveness and maximum performance. The turbo lag is not only noticeable due to the frequently mentioned "thinking pause" when starting at traffic lights but also, to a limited extent, due to draft or the effectively available speed band. This can be compensated by more frequent gear changes, but that negatively affects driving comfort and background noise. An additional boost with the 48-volt e-charger can help in this case.

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