The bored-out Land Rover 1.6litre
engine [known as the 2 litre "siamese-bore"], with no
water cooling passages between cylinders,
fitted to Series 1 Land Rovers from 1952 to 1954 did
not present serious overheating problems. However, Rover decided
to change the design of the block and introduce water cooling between
This new design became known as the Land Rover 2 litre "spread-bore"
and had the same power and torque specifications as its previous
The "spread-bore" was fitted to Series I Land Rovers from
late 1954. The 2 litre "spread-bore" engine was fitted
to the 86in and 107in Series I's and also to the 88in and 109in
Series I's when they were introduced in 1956. Infact the engine
was even fitted to the first 88in Series II Land Rovers produced
The Rover 60 car had had some overheating problems when fitted with
the 2 litre "siamese-bore" engine (perhaps due to the
higher weight of the car and the sustained high speed motoring it
encountered) so the "spread-bore" version was fitted to
the Rover 60 one year earlier than to the Series I Land Rovers.
A main difference between the Rover 60 and the Series I Land Rover
engine was that the car version had an alloy cylinder head instead
of cast iron.
features of the Series I "spread-bore"
compared to the "siamese-bore":
spaced pipes on the exhaust manifold
step in the rear of the engine sump
fan riveted instead of welded
oil filter on the right hand side of the block
swept engine volume: 1997 cc
piston stroke: 105mm
compression ratio: 6.8:1
carburettor: Solex 32 PBI-2
power: 52 bhp at 4000 rpm
torque: 101 ft lb at 1500rpm