The speedo on the Roadster was spot on, compared with GPS on a straight, flat road.

The speedo on the Plus 8, both the analogue and digital, over read by about 5%.

ne thing that MMC culd have done wuld be to have made it posible for the digital display to read either mph or kph. My BMW does this...

Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...