Two Out of Three Ain't Bad

We own two of these three cars ... very happily.

Bob Wilson

 

I ran three, bidirectional, benchmarks using a dash cam on a fairly flat, paved road on the west boundary with the airport. I then transcribed the GPS time, latitude, and speed

Surprising results:

• Nearly identical acceleration to 65-70 mph
• 2014 BMW i3-REx is speed limited to ~90 mph
• 2014 BMW i3-REx performance the same in EV or with Rex running

The SRM3+ acceleration is set to 'Chill' versus 'Standard' so I need to compare these modes. Furthermore, there are other options like 'traction control' that may affect acceleration rate. Finally, I did not try to launch either car by holding the brake, full press the accelerator, and release the brake. However, I may wait until the GPS mouse arrives and add high resolution accelerometer data.

My primary interest is in getting a net HP reading for both cars. I had used a maximum hill climb with the SRM3+ but initial results indicated a maximum of ~160 hp. This and earlier data suggests hp is limited up to about 70 mph. I suspect that road measured hp metrics requires speeds above 70 mph for each vehicle.

Bob Wilson