We have the full story on the new 5.5-liter V8 engine from AMG. The details inside.

Mercedes AMG has pulled the lid off a new eight-cylinder engine they plan to begin using in their new vehicles beginning this summer.  The engine will make its debut in the Mercedes-Benz S63 AMG, and will be mated to the company's new seven-speed SpeedShift MCT transmission.

The 5.5-liter biturbo direct-injection V8 petrol engine will be available in two different power settings.  First, the company will sell a 544 PS (400 kW / 537 hp) version that produces up to 800 Nm (590 lb-ft) of torque at 2000-4500 rpm.  An upgraded version produces 571 PS (420 kW / 563 hp), and up to 900 Nm (664 lb-ft) of torque at 2500-3750 rpm.

In the S63, the engine uses 10.5 liters of petrol per 100 kilometers, or roughly 22.4 mpg-US.  Features in the engine include start/stop as part of a driving mode called "Controlled Efficiency."  According to the company, this helped bring fuel consumption down 25 percent compared to the current S63 AMG.

Despite the greater efficiency, the new engine gets the S63 to the 100 km/h mark in 4.5 seconds, 0.1s faster than the previous model.  Like the last version, the S63 AMG will also be electronically limited at 250 km/h (155 mph).

You can read more about the 5.5-liter V8 AMG engine in the press release below.

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