The new Aston Martin V12 Speedster is a bit of a looker, isn’t it? It’s basically a Vantage that’s had its roof sawn off, and instead of a twin-turbo Mercedes V8, it has a 700hp 5.2-litre V12 from the DBS Superleggera. So it should sound epic. Is it fast? Well, it’ll do 0-60 in 3.5 seconds and will blast your toupe into the middle of next week when it tops out at 186mph. Good thing it comes with two helmets behind the headrests, then…