And herein lies the genius of Mercedes-AMG's engine building.
The genius of Mercedes-AMG's 4.0-liter twin-turbo V8 doesn't lie solely in the neat little technologies that help it make horsepower with minimal turbo lag, such as the hot-V turbo configuration. That might be cool to us engine nerds, but Mercedes is more interested in how applicable the engine is to various models without making extensive modifications. It's why the AMG division can use a single engine to supply the power demands of much of its lineup, barring only smaller variants or V12-only versions of its vehicles.
With careful configuration of the hand built motor, AMG can extract multiple power outputs with a top end range of 600 horsepower in the AMG E63 S. A slight detune gives the AMG GT R a still-impressive 577 ponies, but how do the two cars with practically matching engines compare to one another in character?
That's a question that needs answering, especially if Mercedes plans to further homogenize its engine lineup and rely on electric power to make up the horsepower differences. By taking both the AMG GT R and AMG E63 S to Carfection's test track, we can see how similar means of power delivery allows the two cars to compete. However, it's unfair to compare the cars straight across the board given that one is a supercar outfitted with proper aerodynamics and a sophisticated nine-mode traction control system while the other might as well be a four-door supercar with one of the coolest variable four-wheel drive systems on the market. The ideal scenario? Buy both…if you have the means.