The V-12-powered Aston Martin DB11 may be gone, but something even better has taken its place. With improved handling, more power, and thoughtful cosmetic upgrades, the DB11 AMR improves upon Aston Martin’s original formula for grand touring.

Aston’s AMR sub-brand has created high-performance variants of the Vantage and Valkyrie, and now the DB11 benefits from the treatment. Slotting above the 503-hp DB11 V8, the model packs a 5.2-liter V-12 with 630 hp. This is 30 more hp compared to...

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