Custom. Its all about tyres, wind and my 540 is heavy with full comfort seats, all asists, nv, full tank, about 30-50kg in the trunk plus me 86
so last 0.6 can be lost when the wind will be in right dirwction
340i is making 9.9 with 470hp so its all about wind and weight. Last 10 kph is most painfull.
I love that silver so much!!!! U need cf spoiler for me and will be perfect and clean