SKY
Kraftwagen König
I'd put McLaren engineering up against any German brand.
Well, you better, as it is the only british engineering you can compare to any german brand. RR has german tech, and same for Bentley (and guess what? they are now much better) and I would assume a lot of potential Aston Martin customer will be glad the brand will be using AMG tech in the DB11, intead of their ancient V12s.
I will leave aside Indian-owned brands due to their irrelevance in the performance sector.