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Originally Posted by henk4
If you want to ignore speed bumps buy a big Citroen  |
Big?
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Is it true that an automatic car will use more fuel doing a steady 20 mph than when doing 30?
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Yes. Some do. And some don't. Some even get better mileage at 40 mph than at 30 mph. Here is an example:
---------------------------- MPG @ 30 mph- @ 40 mph--- @ 50 mph
'68 AMC Javelin (290-cu-in)------ 24.5----------- 23.5------- 20.5
'68 Ford Mustang (289)---------- 23.5----------- 24.0------- 21.5
'68 Dodge Charger R/T (440)----- 18.0----------- 18.0------- 16.5
'68 Buick Riviera (430)----------- 19.0----------- 19.0------- 17.5
'68 Ford Thunderbird (429)------- 18.5----------- 18.0------- 17.0
'68 Mercedes 250 (152-cu-in)---- 23.5----------- 22.0------- 21.0
'68 Rover 2000 (121)------------ 34.5------------ 31.5------- 28.0
'68 Peugeot (99)---------------- 33.0------------ 31.5------- 29.0
'68 Volvo 144 (109)------------- 31.5------------ 31.0------- 27.0
'68 Ford Galaxie (302-cu-in)----------- 21.0------------ 21.5------- 20.0
'68 Pontiac Catalina (400)------- 19.5------------ 21.5------- 22.0
'68 Dodge Polara (318)---------- 23.5------------ 23.0------- 22.5
'68 Chevrolet Impala (307)------ 21.0------------- 19.5------- 19.5
'68 AMC Ambassador DPL (290)-- 22.5------------- 21.5------- 19.5
Note: the Pontiac had a very high (2.29:1) rear axle ratio which is why it got better mileage at 50 mph than at 30 mph.
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Cars:
Something which the Americans have made quite a few of which are designed and built and operate properly.
1969 Cadillac Fleetwood Brougham... 0-100 mph in 20 seconds.
Last edited by Fleet 500; 02-04-2008 at 02:03 PM.
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