Mercedes-Benz GL400 2011

Today, many numerical designations no longer reflect the engine's actual displacement but more of the relative performance and marketing position. Despite its engine displacement in two litres, the powerplant in the A45 AMG produces 355 brake horsepower so the designation is higher as to indicate the greater performance. Another example is the E250 CGI having greater performance than the E200 CGI due to the different engine tuning even though both have 1.8-litre engines. From the marketing perspective, E200 seems more "upscale" than E180. Recent AMG models use the "63" designation (in honor of the 1960s 6.3-litre M100 engine) despite being equipped with either a 6.2-litre (M156) or 5.5-litre (M157) engine.