View Poll Results: How many K's do you get out of tank of fuel?

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  • 300 - 350

    62 4.65%
  • 351 - 400

    96 7.20%
  • 401 - 450

    191 14.33%
  • 451 - 500

    222 16.65%
  • 501 - 550

    254 19.05%
  • 551 - 600

    217 16.28%
  • 600 +

    291 21.83%
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Thread: Fuel Economy - What do you get out of a tank? (3rd gens only)

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  1. #1
    bb61266's Avatar
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    Quote Originally Posted by shaness8 View Post
    Why ?
    Why V8?

    A F1 Broadcaster years ago described the engine design problem - V8 - V10 V12 - it comes down to How bigger bang you can make (Cylinder size) vs how often you can make it (stroke & number of cylinders) - For formula 1 you wanted the "max" in power; - for fuel economy you want barely the least to turn over a high gear.

    Now complicate this with the need to not run an engine too lean or it will burn up - and a V8 you would think would need more fuel with 2 more cylinders - but a v6 will "stall" out sooner than a v8 as it's "bang" ratio is lower and/or the bang is a bit bigger to compensate - so it's final drive ratio must be lower and/or uses more fuel to make the same ratio..

    So a V8 with a really tall final gear will be able to make a lot of small bangs just keeping the car in motion which is what you want for hyper mile driving.

    So a V12 would be better again in theory - but you need modern fuel management - not like my Jaguar Xj-S....
    Last edited by bb61266; 30-01-2012 at 06:43 PM. Reason: better grammer
    Jaguar XJ-S V12 (sunday car)
    TR V6 Executive Wagon - retired
    TH 3.5 V6 Executive Wagon - Retired
    TJ 2001 Sportswagon - Loving the new car

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