Yes I know downsizing engines to reduce emissions and increase efficiency is pretty much manufacturers biggest concern but my biggest concern is that we are going to downsize to a point where it is not exciting. The latest big boy from Mercedes the S63 AMG features a 5.5-litre twin-turbo V8 and reports from Carsales indicates that this could be the last in any Mercedes ever made. They think a new V8 will be made by welding two 2.0-litre four-pot motors from the A-Class to create a twin-turbo 4.0-litre V8. To be honest it would be rather difficult to squeeze 577 hp (existing) out of a 4.0-litre V8 and so I would think there would almost certainly be an electronic unit to boost the power to something substantial. This is all speculation for now but it does make a lot of sense.
Report Suggest The S63 May Be Last 5.5-Liter V8 Twin-Turbo Mercedes