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Land Rover Repair/Fuel Injection


QUESTION: John, I would like to put a 4.6 in my 1980 MGB however the 4.6 FE will not fit under the hood. Will the 4.0 FE work on this motor & do you have a complete 4.0 FE set up for sale?

ANSWER: There is no difference in the fuel injection between 4.0 and 4.6.  Maybe you are looking at newer or older motors? There were three generations of fuel injection , 14CUX 1987-1995, GEMS 1995-1999, and Bosch Moronic 1999-2004.  They look different

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QUESTION: Thank you for your response. I am looking at older engines (1998 to 2005)

Right, within that window there are GEMS and Bosch engines.  There is no difference re 4.0/4.6.  

The top photo is a Bosch motor.  The bottom GEMS.  It sounds like you want to find the bottom style in 4.6L

When you get a motor remember you will need the correct control unit for the fuel injection.  GEMS and Bosch don't have any shared parts.

Also - there are companies in the UK selling racing control units for both - we see people fit them when these engines are in Morgans, etc.  Not sure where to look for them but they are out there, tho not street legal in USA

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John Elder Robison


I own J E Robison Service in Springfield, MA. We are Bosch Car Service for Land Rover, BMW, Mercedes, and other European lines. I can answer most questions about Land Rover service or repair. I'm known as a car enthusiast, machine aficianado, photographer, writer, and speaker. I've been around Land Rovers and British cars most of my life. Visit me at my car business, or my author website, Check out my autism and writing blog at or my photos on John Elder Robison


I have been a Land Rover service manager since Land Rover returned to North America in 1987. My company is a four-star Bosch Car Service facility, known nationwide for Land Rover service, overhaul, customization, and restoration. In addition to Land Rover our company services BMW, Jaguar, Mercedes-Benz, Rolls_Royce, and Bentley motorcars. We have factory-plus-level service capability for all makes. Visit my company online at > service > land rover Also visit my blog at


In the Land Rover world, my writing can be found in various print magazines and online at robisonservice.blogspot,com. In the wider publishing world, my work is published by 20 publishers in over 50 countries. Mt books Look Me in the Eye, Be Different and Raising Cubby have made US and international bestseller lists.

I am ASE certified, Bosch Trained, and trained by Omnitec/T4 and Autologic on their Land Rover test systems.

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