As a long overdue follow up to my originally planned comparison here is some performance comparison data for a Vespa 250cc scooter, a Vectrix, an XM-3500Li and an "XM-4500Li". The "XM-4500Li" is not a "real product" it's an XM-3500Li that has been upgraded as follows: 4 more 40Ah LFP cells (24 cells total), a 4500W motor from Kelly Controls and a Kelly Controls 300A controller.
Here are the pertinent numbers:
|0-48 kph||0-80 kph|
|0-30 mph||0-50 mph||Vmax - kph||Vmax - mph|
The data was collected with fresh battery charges on level ground on non-windy days. All data was collected and analyzed using Corsa Instruments hardware and software.
Some things to note:
1. The Vespa's speedo indicated 75mph the GPS data was 65mph (see, we told you it wasn't just XM's that had "optimistic speedos"! ;)
2. Vectrix claim a 0-50mph time of 6.8 seconds on their website. It's possible that we could maybe squeeze another 0.5 to 1 second of improved accel time (after all I was riding someone else's bike!) but does anyone know of any independent online performance figures for the Vectrix? Do any intrepid Vectrix owners want to provide an electronically measured (e.g. GPS, radar, accelerometer) 0-50mph (0-80kph) time for us?
3. Note how close the Vectrix is to the Vespa.
4. While the XM-4500 isn't as quick off the line many people have ridden it and commented on how "brisk" the acceleration is.
5. The top speed we managed to get out of the XM-3500 on the day of testing was 38 mph - however, we had seen speeds of 42 mph at other times. We're not sure what caused the discrepancy - we checked the usual suspects (brake drag, tire pressure) but didn't spend too much time worrying about it.
I'm no longer planning on the head-to-head comparison noted in my previous link above. We collected the above data as input for our rEV 1 project. We will publish performance data for that bike when we've finalized our setup.
Note, do any RMartin EVD owners want to provide similar data for us? It would be great if you do - but please let's have something that's electronically measured and logged (e.g. GPS, radar or securely mounted accelerometer - GPS preferred).
I hope you find the data interesting. We hope to add a Kymco 200 (really a 160cc) to the line up as well.