I have a 1998 Citroen Xantia 1.9 Turbo Diesel.
2006-07-13 10:46:33 · 20 answers · asked by anonymouse 2 in Cars & Transportation ➔ Other - Cars & Transportation
For longer journeys, settle down behind a coach or a truck and let the drag tow you along, for shorter journeys, try and change up a gear before the turbo kicks in, plus, read the road as far as you can and let off the throttle and coast in gear for as long as you can before having to brake,, by coasting you use NO fuel at all,
seriously check this link http://uk.answers.yahoo.com/question/index;_ylt=ApFDIHqMD0AWUsxLPCDwcxsgBgx.?qid=20060713100156AAzYaRN
by doing this you can save as much as 50% of your fuel costs
I know the car will feel slower than a stoned snail but its not a sports car anyway(not to mention its a lot safer to drive that way)
2006-07-13 13:27:57 · answer #1 · answered by India 55 5 · 3⤊ 1⤋
The most econimical speed (give or take) is about 55mph on a flat road where conditional allow.
This accounts for 1,9 TD, 5 speed box.
(I used to drive 1.8 TD Mondeo)
At that speed, on the flat, there will be minimal boost pressure from the turbo so less fuel is being burnt than at full throttle.
Granted, if you pootle around at 30mph in fifth, you'll use proportionally less fuel for the speed & distace - but may risk over-stressing the big end / conn-rods from the high torque & low rev strain.
I honestly wouldn't worry about fuel economy - it's a diesel, Just be thankful it's not a V8 Jag....
2006-07-13 10:58:56 · answer #2 · answered by creviazuk 6 · 0⤊ 0⤋
With almost any vehicle, and with turbodiesels in particular, your most economical speed will be whatever the slowest speed is you can drive in top gear. This is when diesels shine, as their design does not suffer from throttling losses (diesels do not have a throttle plate). Even if you are lugging the motor down at 1100 rpm or so, at 45 mph in top gear, that's when you will saving the most fuel.
2006-07-13 11:06:22 · answer #3 · answered by Harry 5 · 0⤊ 0⤋
50 mph
As you get faster the power needed to push the air out of the way increases exponentially. The fuel consumption to drive at 65mph vs 55 mph is a 20% increase.
2006-07-13 10:52:23 · answer #4 · answered by Gregory B 3 · 0⤊ 0⤋
Actually the internal combustion engine is at its most efficient speed around 60-80mph or 100 to 140 km/h.
2006-07-13 10:56:06 · answer #5 · answered by doluckrx7 1 · 0⤊ 0⤋
You get the highest efficiency in top gear, at the lowest speed you can maintain without the engine struggling ... maybe 45 miles per hour / 70 kilometers per hour.
2006-07-13 10:51:06 · answer #6 · answered by jackalanhyde 6 · 0⤊ 0⤋
Using the metric system:
The most economical speed for most entry level sedan depending on course are 110km/h on a freeway, 79km/h on a highway and 52,5Km/h down town.
2006-07-13 10:52:11 · answer #7 · answered by kope k 2 · 0⤊ 0⤋
Zero! Seriously, the faster you go, the more fuel you use. Just go with the flow of the traffic, and don't worry about it, the difference will not be that huge. If you're that bothered about fuel consumption, you shouldn't be driving.
2006-07-13 10:51:24 · answer #8 · answered by Darren R 5 · 0⤊ 0⤋
Around 57 miles per hour.
2006-07-13 10:58:09 · answer #9 · answered by The Wandering Blade 4 · 0⤊ 0⤋
Who cares? Warp speed Mr Zulu...
2006-07-13 11:01:55 · answer #10 · answered by btmduk 3 · 0⤊ 0⤋