I'm so glad my Jap spec MINI came carbed

SPI's were from late '91 through late '96 and MPI's were from late '96 through late 2000 if my memory serves me correctly. As mentioned the Jap spec cars were mpi blocks with SPI injectiong and side radiator cooling.

Due to the location of the a/c compressor Terry. It would interfere with the front mounted radiator along with the higher location of the alternator. All this was done to accomodate the needs of the Japanese market which from what i have heard was Rover's/Mini's biggest market in the 90's.

Guys they couldnt make the MPi configuration work with auto tranny..

From what I remember, and I didn't pay enormous attention to it, it was an MPi block with SPi injection gear.

I don't think there is an MPi automatic.

There are automatic SPIs that used MPi components, but they still used the SPi MEMS and throttle bodies.

They did use the side mounted radiator. Someone at one time had a reason as to why they did this, but I do not recall what it was.

Alex have you seen an MPi automatic in person? i thought they were rarer than rocking horse stuff...

The automatic MPis also had side mounted radiators - possibly the cars with aircon as well - instead of the MPi front mounted rad.

i think this was applied only to the automatic configuration. They couldnt make the MPi work with autos for some reason..

The Japanese spec cars at the end were SPi in MPi clothing.

The injection system is SPi but used the MPi block and other components. I believe almost all had air con.

Terry

(SPI was only for a couple of years, replaced by the MPI once it was ready)

You can't copy a picture into the message dialog box from your computer. Use the big green burrot at the top left of the box. Pictures must be less than 3M in size. There's a way to post pictures bigger than 3m but its easier to reduce the size in PhotoPaint or the like.

The the different compression ratios you quote are close enough together to be immaterial. There are a host of reasons why the engine designer chooses the compression ratio which would take a book (or a chater of a book) to explain.

Thank you so much Alex. Sorry, I'm new with the MiniClassic, so still need to learn a lot about the technical spec. Below is my mini photo, can u give me more details whether is under SPi (Standard 9.4:1 or High Compression Ratio 10.1:1) or MPi (High Compression Ratio 10.1:1). What's the different between this 3 type of ratio?

Thanks in advance.

John Cooper admitted at the time that 90 hp was pure marketing  ....

Cheers, Ian

The simplest thing to do is look at the engine.
If the oil filter is in the original position it is an SPi, if it is upside down in the top left corner of the block as you look at it, it's an MPi.

Engine and chassis numbers are in no way a guarantee of the spec of the engine in a 17 year old car (I'm assuming you're not in the USA as it would be totally illegal to own) as unless you have owned the car from new you have no way of telling if it's been rebuilt.

The first upgrade I'd do to an MPi is change the final drive to something much shorter - this has the effect of making the car feel and also go a lot quicker without any other efforts.
The second thing I'd do is change the Rover MEMS injection to an SC aftermarket setup - the Rover ECU simply won't do 90 BHP, despite claims to the contrary.

Need help. I bought a Mini Classic Rover 1998, Japan spec with Airbag. According to my Chassis/VIN no. The VIN, Eighth (8th) position is "Y". According to information from MiniMania, X=1300 SPi (Standard Compression Ratio, 9.4:1), Y=1300 SPi (High Compression Ratio, 10.1:1) and Z=1300 MPi (High Compression Ratio, 10.1:1). I'm not sure whether my engine spec is under 1300 SPi (Standard Compression Ratio, 9.4:1), 1300 SPi (High Compression Ratio, 10.1:1) or 1300 MPi (High Compression Ratio, 10.1:1)? Can indentify by Engine No. beside Chassis/VIN No.? Can anyone of U explain more details about this?

1)How to differentiate by this 3 spec.

2)What's the different between this 3 spec.

3)Any different between SPi & MPi (High Compression Ratio, 10.1:1) because I have check with few workshops and all of them gave me different answer. So I really confusing.

4)If I want to do John Cooper conversion from www.minisport.com, which one from below given more suitable for my mini:

a)John Cooper 1275cc SPi 82bhp conversion (Part no. MCP1275SD_MAS)

b)John Cooper 1275cc MPi 90bhp conversion (Part no. MCP1275SW_MAS)

Thank you so much in advance. Really appreciate anyone help.