America’s got talent. Notably, the CT5-V Blackwing – Caddy’s BMW M5 and Mercedes-AMG E63 rival – and its massive 6.2-litre supercharged V8. We’re talking a colossal 668bhp and 659lb ft of torque – that’s 48bhp and 106lb ft more than the new BMW M5 CS. It’s the most powerful roadgoing Cadillac ever. But there’s more you should know than that. So here is Top Gear Magazine’s Jack Rix with handy five-point guide... | Top Gear