The Triumph slant-four is an inline four-cylinder petrol car engine developed by the Triumph Motor Company. It first appeared in 1968 in the Saab 99. The first Triumph model to use the engine did not appear until 1972. With an original capacity of 1.7 L, displacement grew over time to 2.0 L. Triumph production ended in 1981.
In 1963 Triumph's Chief Engine Designer Lewis Dawtrey presented the results of his analysis of future engine technology trends and Triumph's anticipated needs.
[1] After evaluating
rotary,
horizontally opposed,
V4 and
V6 configurations Dawtrey recommended an
OHC engine family composed of both
Inline-4 and
V8 engines that could be built with the same tooling. The new range would be built in capacities of 1.5 L to 3.0 L, allowing it to replace both the four-cylinder
Standard SC and derivative
Triumph I6 engines whose roots reached back to the
Standard Eight of 1953. The recommendation was accepted and development began in-house at Triumph by a design team led by Dawtrey and
Harry Webster. The initial model was to be a 1.5 L inline four.
At about the same time
Saab was working on designing and building 55 hp 1.2-litre and 68 hp 1.5-litre prototype inline four engines for their upcoming
99 model. UK engineering and consultancy company
Ricardo was involved in the Saab project and, while
not directly involved in development of the slant-four, did have a general engine-development contract with Triumph and was aware of their progress. When Saab determined that developing their own engine would be too expensive and too risky, Ricardo put Saab into contact with Triumph.
The facts are as they are.
SAAB adopted, and eventually modified, a
Triumph unit for their own use, and Ricardo were not involved in the development of that particular unit. However, although it is a Triumph unit SAAB were first to stuff it in a car and sell it.
Much discussion here among SAAB owners themselves...
https://www.saabcentral.com/threads/saabs-triumph-derived-engine.178035/
You might want to check in future before suggesting im mad (I am indeed a loon, but for different reasons,)