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10th March 2022, 20:07 | #1 |
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Rover 75 Saloon Join Date: Jan 2022
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Really short gearing, or is it just me?
Hi all, I've had my 2001 75 1.8 manual for a couple of months now and it's been used a fair bit, gone up to Wolverhampton (I'm in Bristol) and I've noticed a couple of things about it, the main one of those things being the gearing. Why is it so short? At 70mph it's doing about 3500rpm, and it's a bit annoying. I love it, but at 120mph (private road yada yada) it's basically on the limiter. I was talking to someone with a 1.4 25, and they were saying that the gearing is strangely long on it. Is it possible that someone's put the wrong gearbox in my car or do all 75s just have really short gearing, or is it just that I'm used to big Mercs which do autobahn speeds at really low rpm?
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11th March 2022, 06:55 | #2 |
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
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Hi Finn,
Your gearing is correct for your 1.8 manual. The ratios are chosen to complement the engine power and torque characteristics and to achieve reasonable fuel consumption. Simon
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11th March 2022, 07:36 | #3 |
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MG ZT-T 180 Join Date: Sep 2020
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According to my MG ZT brochure, gearing is as follows:
1.8 120 - 20.7 mph per 1000 rpm in 5th so 3380 rpm at 70. 1.8 160 - 22.2, 3150 rpm 2.5 160 - 23.5, 2975 rpm 2.5 180 auto - 28.1, 2490 rpm 2.5 190 - 21.0, 3333 rpm 2.0 diesel manual - 29.2, 2400 rpm 2.0 diesel auto - 31.7, 2200 rpm |
11th March 2022, 09:15 | #4 |
This is my second home
rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009
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What's 70mph look like 😁
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11th March 2022, 11:15 | #5 |
I really should get out more.......
Rover 75 connoisseur se v6 auto Join Date: May 2014
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My 1.8t revs dead on 3000 at 70 mph.
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She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide. |
11th March 2022, 11:45 | #6 |
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Have you got 40 series tyres fitted?
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11th March 2022, 18:29 | #7 |
Gets stuck in
MG-ZT 260SE Join Date: Apr 2013
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You beat me to it. When I had a new engine fitted I was told not to take her over 3000rpm for the 1st 1000 miles, fortunately for me I had a trip down to London soon after so got most of my 1000 miles done in a very short space of time at a steady 70mph.
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This vehicle was the 5,293rd ZT to run off the production line, out of 18,894 This vehicle was the 1st ZT 260 SE to be made out of 384 This vehicle was the 75th ZT in Starlight Silver (code: MBB) to be made out of 2,479 Starlight Silver ZTs (Now in Zircon) |
11th March 2022, 21:03 | #8 |
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Rover 75 Saloon Join Date: Jan 2022
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Thanks, so basically there's not really anything I could do to make the gearing just a tiny bit longer, like no slightly longer factory final drive or anything?
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12th March 2022, 07:01 | #9 |
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
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Thanks for your reply Finn.
If you did that your acceleration would suffer. If it really bothers you I'd say your best bet is to look out for a nice 1.8 Turbo which will give you 3,000 rpm at 70 mph. Simon
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