Land Rover 90 and 110 Repair Help: Learn How to Fix It Yourself.

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The Land Rover 90 and 110 (One-Ten), launched in 1983 and 1984, represent the critical link between the leaf-sprung Series vehicles and the modern Defender. While they look nearly identical to the older Series III, they were a mechanical revolution for Land Rover. The naming was a direct reference to their wheelbases in inches: 92.9 inches for the "90" and 110 inches for the "110." This era brought the "utilitarian" Land Rover into the modern age

Author: oldturkey03 (and one other contributor)

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The "Carry-overs": Early models used the 2.25L petrol and diesel engines from the Series III, which were quickly found to be underpowered for the heavier 110 chassis.
The 2.5L Era: Land Rover introduced the 2.5L Diesel (12J) and 2.5L Petrol (17H), followed by the 2.5L Turbo Diesel (19J) in 1986.
The V8: For those needing power, the 3.5L Rover V8 (paired with the LT95 or LT85 transmission) provided a significant boost in performance, though at the cost of fuel economy.

Transmissions: Initially used the LT95 (4-speed) and later the LT77 (5-speed), which made highway speeds much more manageable.
Transfer Box: The legendary LT230 transfer case was introduced, which is still highly regarded by enthusiasts for its strength and reliability.
Brakes: The 110 featured front disc brakes as standard, a necessary upgrade for its increased towing and payload capacity.

The Grille: The recessed grille of the Series III was replaced with a full-width flush grille and a revised wraparound bumper.
Wheel Arches: Due to the wider track of the new axles and coil suspension, Land Rover added plastic wheel arch flares (eyebrows) to cover the tires, creating the iconic Defender silhouette.

Length (110): Approximately 181 inches (4,597 mm).
Length (90): Approximately 142 inches (3,605 mm).
Payload: The 110 was designed to handle a 1.1-ton payload, making it a favorite for military and commercial conversions.