Nissan GTR VS Mercedes-AMG S-Class 63
Nissan GTR 2018 VS Mercedes-AMG S-Class 63 2018
2018 Nissan GTR VS 2018 Mercedes-AMG S-Class 63

2018 Nissan GTR:
It will use the engine from Nissan's 2015 Le Mans racer: Speaking to TopGear.com, Ben Bowlby - Nissan’s creative genius behind the LMP1 GT-R and the DeltaWing - confirmed that the new GT-R would feature an iteration of the twin-turbo V6 powering the company’s Le Mans entrant. “The 3.0-litre V6 [from the LMP1 car] is a sort of god-child of the true, road-going GT-R,” he said, noting that the unit’s direction injection, turbo integration and combustion technology are all ‘applicable to the road’. “It is truly an early ancestor of what will be a future Nissan GT-R engine,” he added. In its current, Le Mans-spec form, that new 3.0-litre V6 revs to around 6,500rpm and produces over 550bhp. Considering the current Nismo GT-R produces 600bhp, and taking into account the GT-R’s rate of improvement, we’d expect the new, ‘R36’ GT-R to produce at least this much, if not more. The V6 will be slotted up front, just like before, and matched to a dual-clutch automatic gearbox. “Mizuno-san [the ‘father’ of the GT-R] says the GT-R will always be a front-engined, 2+2-seater coupe,” said Shiro Nakamura, Nissan’s chief creative officer....
https://www.topgear.com/car-news/supercar/2018-nissan-gt-r-heres-what-we-know#1

2018 Mercedes-Benz S63 AMG Coupe:
Mercedes-AMG is updating its S-Class Coupés and Cabriolets with a host of technical and visual highlights. The new-design front end is dominated by the Panamericana radiator grille, which now gives the two-door, luxury-class Performance vehicles an even more independent look. In the S63 4MATIC+ Coupé and Cabriolet the AMG 4.0-litre V8 biturbo engine with twin-scroll turbochargers and cylinder deactivation (Coupé) supersedes the previous 5.5-litre V8 biturbo. Despite the smaller displacement, the new engine puts out 450 kW (612 hp) and thus exactly 20 kW (27 hp) more than the preceding model. The AMG SPEEDSHIFT MCT 9G transmission is also new to the Coupé and Cabriolet, as is the fully variable all-wheel drive system AMG Performance 4MATIC+. At the same time with the new eight-cylinder Coupé and Cabriolet, the top-of-the-range twelve-cylinder S65 Coupé and S65 Cabriolet are being given a visual update with the Panamericana radiator grille. The AMG 6.0-litre V12 biturbo engine retains its output of 463 kW (630 hp) and delivers a maximum torque of 1000 Newton metres. "Having already undertaken major development work on our S-Class Saloon to further enhance driving performance and individuality, we are now making the same changes to the S63 4MATIC+ Coupé and Cabriolet. The extensive modifications are designed to strengthen our leading position in this dream car segment in terms of driving dynamics, performance, equipment and comfort on long journeys. The S65 Coupé and Cabriolet with their high-torque 6.0-litre V12 biturbo engine remain the most elite form of the S-Class," stated Tobias Moers, CEO of Mercedes-AMG GmbH....
https://www.netcarshow.com/mercedes-benz/2018-s63_amg_coupe/