Opting for the carbon roof makes it another 10 percent stiffer. As in the outgoing Plus Six, the BMW-sourced turbocharged straight-six makes a healthy 335 horsepower and 369 pound-feet of torque.

For a more visceral experience, we would go for the M4 Competition. A 35k-mile ‘Comp’ is around £5000 more than a comparable standard car, but with 444bhp, a revised suspension set-up and ...

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