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New to Forum: Considering ‘89 Le Mirage Liberty
Hello.
I am new to the forum and new to Prevost ownership. I am looking at purchasing a 40′ 1989 Le Mirage Liberty. It has the DD 6V92 and 4 speed Allison trans. During the test drive, I noticed it would not get above 70 mph with the accelerator pegged to the floor on a flat open stretch of road. Even keeping it at 65 MPH required the accelerator just about pegged to the floor constantly. Is is ‘healthy’ to try to run this coach at 65+ MPH with the pedal floored or was it basically designed to run between 55 and 60 on the open road? Any and all perspectives are appreciated.
Thank you.
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3 Replies
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I had a 1987 Liberty conversion as our first coach. When we bought it the mileage was 42,000 so it was almost new and unmodified. It had a 475 HP 8V82 and for the 15 years I owned it my mileage was 5.6 MPG.
The gearing was such that my top speed was 69-70 MPH. I could get up to about 72 with a good long downhill run with the wind at my back.
I learned quickly to drive it at 1800 RPM which was pretty close to 60 MPH. Trying to drive faster was a recipe for trouble. If we needed to pass someone when driving faster I was at my max speed and if the person being passed sped up even a little, I was hung out to dry. I found out how relaxing it was to be one of the slowest on the road. I rarely had to get off the cruise control because everybody was going faster. It was actually enjoyable putting my type A personality in storage for a while.
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Tab: In almost ten years of seriously following Prevost coaches (and this Forum almost daily) your test drive was the first I recall hearing of an 1989 coach with a DD 6V92. Round numbers it should have 75% of the horsepower and torque of the 8V92 that I would have expected a coach of that era to have. I would guess that to be material and your experience apparently bears that out.
That said, I have for a number of year stated that the #1 best value in RV’ing today is a very late 90’s and early 90’s 8V92 Prevost with a professional conversion (apologies to the DIY crowd). While they seem to be addicted to diesel fuel, if you put a modest amount of miles on them they sure have a lot to offer. Looking at the asking prices and hearing once in a while that they trade for … you sure get a bunch motorhome for your money, especially if get an all electric coach (no propane).
Do you know the Vin# of the coach? It should be able to be deciphered to learn the year of the shell and confirm the age of the shell and drive-train. Typically a Prevost conversion is advertised and often titled one or two years after the date of the chassis shell when it left the Prevost factory in Canada.
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I had a 89.. 5mpg ..As far as diy people(me) I wish I had a liberty! $$ says otherwise. Besides I’m a builder and that is a good part of ownership. 40ft and year is a plus..$$ need to be considered. I prefer a 60series coach. Also miles on coach?? Is 6-V92 a transplant? Bob
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