The latest S63 AMG has adopted the all new 4.0 litre V8 AMG engine rather than the older model's 5.5 litre, and it's made a huge difference. Response to the throttle is much faster due to the proximity of the turbos sitting centrally between the banks of cylinders, improving the cars initial response but also giving it a stronger top end meaning it's more fun to rev out. While the whole concept of really working an engine seems the direct opposite of the S-Class' raison-d'etre it's actually really fun to do, providing you've got the space and there aren't that many places in the UK where the S63 can really stretch it's legs - you almost feel cruel for not taking the car to it's homeland and letting it have free rein on the autobahns there. Having the combination of huge power, hot rod handling and sumptuous ride and interior ambience really is a heady combination, and well worth it even if it you do pay heavily for the privilege. The entire selection of new Mercedes S63 AMG deals are shown above, just select the new car specification you're after to see our best prices, deals and special offers from our authorised UK main dealers on a new 2021 S63 for sale in the UK, either as a cash deal or with a low rate PCP finance quote.