So something which struck me, to be a bit strange were Hondas figures for top speed on the 1.5l turbo. The car is more powerful, has a claimed better drag coefficient and yet it should only reach 220 kph or even 200 kph with the CVT.
Some real world tests with the CVT are reaching 208 kph (not in hatchbacks as far as I've seen, but they shouldn't be too far off). For the 6 speed manual, I haven't found any real world tests just yet. Only 0 to 60 mph tests, which aren't that helpful in this regard.
So, theory time with Arsenal it is. I'm not that sharp when it comes to car mechanics and stuff, but I think I've grasped some of the basics for top speed and stuff.
So I'm basing this on the following:
6200 rpm max, 17 inch wheels with 235/45 and the gear ratios given in the brochure: 3.642; 2.08; 1.361; 1.023; 0.829; 0.686; 4.105
And the results are the following:
1st Gear (mph): 31 1st Gear (kph): 50
2nd Gear (mph): 55 2nd Gear (kph): 88
3rd Gear (mph): 84 3rd Gear (kph): 134
4th Gear (mph): 111 4th Gear (kph): 178
5th Gear (mph): 137 5th Gear (kph): 220
6th Gear (mph): 166 6th Gear (kph): 265
So a lot quicker than the Honda figures. Of course the top speed is also limited by power. So my 8G 103kW diesel goes up to around 230 kph. The air drag will be the most important factor here. The force required is 103kW/230kph = 1620 N. With this I can calculate the Cd*A of the 8G Civic to be 0.661 m˛. Now each generation is said to be aerodynamically improved, but let's just take this figure and move on.
With this and another nice formula a 8G Civic with 134kW (180 hp) should reach 250 kph.
So it could be that a manual transmission 10G reaches more like 245-250 kph instead of the 220 kph.
As for the CVT, the theoretical maximum speed is (gear ratio: 0.405 and 4.810): 240 mph or 386 kph. So clearly: the numbers are wrong or (more likely I think) the top speed is electronically limited at 200 kph.
I wonder why they do that. Sure adjusting it to go all the way to 386 kph is complete nonsense, but why not to 220 kph like in the manual transmission? Do you think someone will mod the CVT in a way to reach a higher top speed? Is the CVT not able to handle all the power from the engine, so they had to limit it to make sure it lasts?
Yeah, I know, looking at the top speed is stupid considering how often you actually reach it (in Germany I have at least the chance to do so
). But artificially limited devices nag me.