09-16-2014, 10:36 PM | #1 |
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SCANS - 911S, R8 V8 VS i8 (EVO November 2014)
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10-29-2014, 04:59 PM | #3 |
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I have been thinking about why the i8 battery gets low on the track and may understand the problem now. The i8 has a 7kwhr battery, about the same as a 918, but the 918 does not run out. My conclusion is energy to charge the battery comes indirectly from the petrol engine as it is temporarily stored as kinetic energy in the moving mass of the vehicle. Because the i8 petrol engine is much smaller than that of the 918 the car is not going as fast on the track when the brakes are applied, so less energy goes back to the battery via regenerative braking. There are also times when not all of the power of the 918's petrol engine is useable on a track so some of the reserve may be directed to charging the battery. In the case of the i8, these medium power portions of the track will be shorter and there is not as much excess power available for battery charging. At first I thought it was about software, but now I realize it is about where the energy comes from in the first place.
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10-29-2014, 05:10 PM | #4 |
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Thanks for sharing. The i8 is stunning, perhaps the best looking car on sale today, but 7 sec behind the Porsche is pretty cavernous. We need BMW to see through to fruition the rumoured i8S and/or i9 in 2016 if i is to be seen as a true competitor to the 911 and beyond.
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10-29-2014, 05:21 PM | #5 | |
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The i8 can be regarded as a pioneer for what's to come. |
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10-29-2014, 05:29 PM | #6 | ||
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10-29-2014, 05:30 PM | #7 | |
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The 911 needs to look a lot more striking and improve fuel efficiency by at least 400% if it is to be seen as a true competitor to the i8. |
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10-29-2014, 05:31 PM | #8 | ||
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10-29-2014, 06:08 PM | #10 | |
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To put that into context, on the same journeys I used to get about 30mpg UK from my Porsche 981! So the i8's fuel economy is very disappointing To make matters worse, the max. e-Drive range has dropped to 15 miles (due to the lower outside temperatures), but it's still only about 12-15 deg C outside, so I'm concerned the range will drop to 10-12 miles max. during winter! This will have a considerable impact on the regular short journeys I make, which I had planned to drive solely in e-Drive mode. |
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10-29-2014, 07:24 PM | #11 | ||
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Not to mention, no engineering is needed to make a rear engined car to be one of the best handling chassis in the world. Lol! But it sure does not even come close of the claimed 135 mpg of the i8 thou... |
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10-29-2014, 09:58 PM | #12 |
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This article had an interesting conclusion about the driving thrills of these cars. It reflects the dilemma of the i8. For the price, you need to decide between traditional driving thrills or new age technology that is not matching the sports car driving thrills 100%. I am on the list for the i8 but have my hesitations due to the driving dynamics and battery efficiency in cold weather since I live in Chicago. I won't use it on snowy days but we have plenty of cold days here regardless.
Time will tell how I will decide, but a 911 GTS might be in my future instead.....well it'll be fun to finally get either one. Audi is just not there for me. |
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10-29-2014, 11:46 PM | #13 | |
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10-30-2014, 01:20 AM | #14 | |
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10-30-2014, 02:34 AM | #15 | ||
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10-30-2014, 05:15 AM | #16 | |
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It's not conceived at all for the track and one should not even try to make it fit this purpose. Alpina_B3_Lux
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10-30-2014, 06:17 AM | #17 | |
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10-30-2014, 07:48 AM | #18 | ||
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10-30-2014, 08:36 AM | #20 | ||
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10-30-2014, 09:10 AM | #21 |
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They didnt need to even compare them to know what the results were. They were predetermined before the comparo even started much like any comparo with a 911.
There's no beating the 911...its basically God and IMO with the R8 are much better looking inside and out. Performance, handling and precision the 911 EASILY wipes the floor with these two cars. Even a base 911 would have though since its the best platform in the world right now short of hypercars. As Porsche always does hold the bar, they raised it to a point where its really unfair for anyone who has to be compared to it or compete with them (in any sgment). The i8 is one hideous looking car. Its overpriced and underperforming too. Sorry, but wider tires wont account for nearly 7 seconds per lap. |
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10-30-2014, 09:23 AM | #22 |
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