I thought they were limited to 125, but apparently not ...
They were electronically limited to 125. If you can tinker with the onboard computer and get around that lockout, you can go faster.
That's from a game. Real Roadster has its RPM and Speedometer in same dial. The other one shows power usage.
Just for the record, the 2008 model year, 1.5 Roadster has the tack on the left and the speedometer on the right as shown in the video clip. The clip, however, is a fake since the ammeter in the lower right portion of the screen never changes.
It says in video comments "Gran Turismo 5 Gameplay". It's from a game. Looks like they got initial acceleration too slow in the game.