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    • Here are the first 2015 BMW i8 performance test numbers - 0-60 in 3.8 seconds, 1/4 mile in 12.3 @ 114, 3380 pound curb weight

      Journalists have been getting the opportunity to play around with the BMW i8 for the past week and Road and Track is the first of the bunch to post some independent test numbers. How is the i8 performing? Pretty well considering the output and the three-cylinder motor. 0-60 thanks to the instant torque from the electric motor makes 60 come in 3.8 seconds. That is very quick and a great time for a vehicle with this level of efficiency.


      What about the 1/4 mile? 12.3 @ 114 or just quicker than a stock E92 M3. Based on the figures it looks likes an i8 off the line would beat the previous generation M3 from a stop and the race from a roll would likely favor the M3 as speeds rise.

      The curb weight is a relatively lightweight 3380 pounds. Another way to look at the weight is that the car is lighter than new F80 M3. Weight distribution is a very nice 48.5% front to 51.5% rear.

      The car performs as expected and considering the 1.5 liter turbo three-cylinder with only 231 horsepower and the rest of the output coming from two electric motors good for a total of 357 horsepower it is quite efficient. Less power than an E92 M3, but just as fast. 420 lb-ft of torque certainly doesn't hurt.

      It makes you wonder how good this car would be if they just gave it the N20 four-cylinder instead for some serious punch at this $135k price level.


      This article was originally published in forum thread: Here are the first BMW i8 performance test numbers - 0-60 in 3.8 seconds, 1/4 mile in 12.3 @ 114, 3380 pound curb weight started by Sticky View original post
      Comments 45 Comments
      1. bmwsport's Avatar
        bmwsport -
        Click here to enlarge Originally Posted by BlackJetE90OC Click here to enlarge
        Massively up production...I guess. They set a ridiculous initial estimate of 10,000 i3 units on purpose. Makes the new estimate of 20,000 i3 units sound like a news story. That is still considerably behind the Volt/Ampera yearly sales.

        BMW is only producing 1,900 i8 units in the first year. Certainly will sell out those quickly, in fact I think they already did. Not hard for BMW to find 1,900 fanboys.
        The Volt has suffered decreasing sales lately. Only about 1500 units a month. In fact, the LEAF has kicked its but for about 5 months straight, averaging over 2000 units a month.
      1. bmwsport's Avatar
        bmwsport -
        Click here to enlarge Originally Posted by inlineS54B32 Click here to enlarge
        That's pretty impressive. Considering this thing has two electronic motors and an engine, it's weight of 3380 shows how much weight can really be shaven when low-weight is truly the engineering goal. Even 0-100 is on par with an M3 - I would have expected the lower power to show by this speed. This shows how much weight really matters - 357 HP and keeps up with a 420 HP V-8... Not too shabby.

        On another note, if they priced it well, I really believe a car like this would outsell Tesla; why they don't target that price is beyond me.

        Cool car though - definitely faster than I would have bet.
        Drivetrain electrification is unbeatable. This is going to be a common theme with supercars in the future. First of all, the i3 has been rated at an incredible 138MPGe city economy, and 111MPGe Hwy. Much higher than any motorcycle, scooter, or Moped. That is insane. So that is the efficiency aspect. For supercars it is clearly evident how much they benefit from a hybrid electric/gas drivetrain. Just look at the following examples:

        The Porsche 918: Quickest production car lap time around the Nurburgring.

        BMW i8...as quick as a 4.0 liter V8 M3, with only a 1.5 liter engine!

        McClaren P1, Runs a high 9 second quarter mile at over 148mph. Out accelerating a 8 liter quad turbo 16 cyl Veyron with only a 3.8liter engine, and no gas guzzler penalty! And does it without AWD or super wide tires. Like the Tesla, electric enhanced drivetrains have superior launch capabilities.

        Note: The i8 motor is detuned from the i3. It can easily put out another 40hp, if it weren't for the small battery pack. As soon as the next generation of batteries come out, watch out! The Tesla AWD Model S is coming out. IF they had the necessary battery capacity, were are talking 830hp, and 900lbs of torque from the combined output of both motors. They already had a video of the Tesla S giving a M5 a run 0-100 on Motor Trend. So a twin motor Tesla would be some formidable completion, and yet with low drivetrain loses of the second motor (and superior regeneration), efficiency would barely be compromised with that tiny office trash can sized Tesla motor. As it is, a Tesla S is rated at almost 90MPGe, much more efficient than a Prius...its crazy.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by bmwsport Click here to enlarge
        The Volt has suffered decreasing sales lately. Only about 1500 units a month. In fact, the LEAF has kicked its but for about 5 months straight, averaging over 2000 units a month.
        It's because the Volt sucks.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by bmwsport Click here to enlarge
        Drivetrain electrification is unbeatable. This is going to be a common theme with supercars in the future. First of all, the i3 has been rated at an incredible 138MPGe city economy, and 111MPGe Hwy. Much higher than any motorcycle, scooter, or Moped. That is insane. So that is the efficiency aspect. For supercars it is clearly evident how much they benefit from a hybrid electric/gas drivetrain. Just look at the following examples:

        The Porsche 918: Quickest production car lap time around the Nurburgring.

        BMW i8...as quick as a 4.0 liter V8 M3, with only a 1.5 liter engine!

        McClaren P1, Runs a high 9 second quarter mile at over 148mph. Out accelerating a 8 liter quad turbo 16 cyl Veyron with only a 3.8liter engine, and no gas guzzler penalty! And does it without AWD or super wide tires. Like the Tesla, electric enhanced drivetrains have superior launch capabilities.

        Note: The i8 motor is detuned from the i3. It can easily put out another 40hp, if it weren't for the small battery pack. As soon as the next generation of batteries come out, watch out! The Tesla AWD Model S is coming out. IF they had the necessary battery capacity, were are talking 830hp, and 900lbs of torque from the combined output of both motors. They already had a video of the Tesla S giving a M5 a run 0-100 on Motor Trend. So a twin motor Tesla would be some formidable completion, and yet with low drivetrain loses of the second motor (and superior regeneration), efficiency would barely be compromised with that tiny office trash can sized Tesla motor. As it is, a Tesla S is rated at almost 90MPGe, much more efficient than a Prius...its crazy.
        You are quite correct, this is the future. I personally prefer the hybrid approach by the manufacturers you mentioned as they went for balls to the wall performance. BMW went too far in the efficiency direction. Just a minor change is all this needed to go from excellent to epic.
      1. inlineS54B32's Avatar
        inlineS54B32 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        It's because the Volt sucks.
        LOL - straight to the point. Yes, it does. Yes it does. It's ugly, doesn't handle well doesn't accelerate or brake well, costs too much money - and doesn't "really" check off any of the boxes that a car buyer is looking to check except maybe fuel efficiency.

        The problem is no one is going to spend 60k for just efficiency. All people need to do is look at Tesla, and model off of that. It's a great car - and if you care about efficiency, but want to have some fun - it's probably perfect for you.

        On the other hand, I would/will miss that 8400 RPM redline no matter what the outcome of future e-cars is. Click here to enlarge

        Click here to enlarge Originally Posted by bmwsport Click here to enlarge
        McClaren P1, Runs a high 9 second quarter mile at over 148mph. Out accelerating a 8 liter quad turbo 16 cyl Veyron with only a 3.8liter engine, and no gas guzzler penalty! And does it without AWD or super wide tires. Like the Tesla, electric enhanced drivetrains have superior launch capabilities.
        It's just a matter of time before this is done at mass-production levels. I think it's super cool how the P1 "fills in the torque gaps" from the turbos (lag)... This is how it should be done - and, we are going to see some amazing things done once electricity can be contained efficiently. You look at all the amazing things they are doing with this car - that couldn't be done before electrons being introduced to the powertrain. I mean, they actually apply negative torque to the engine, to QUICKEN the RPM drop, to ensure that the upshift is "that much quicker". It's absurd the amount of engineering/thought that went into that beast. Oh, and 0-300 KM/H in 17 seconds. Insane.