Here are some points of divergence concerning the invention and development of the propulsion engines (other than the steam engine). Stirling engines, combustion engines, electric engines, etc. All POD entries are sorted as chronologically as possible.
Plausibility check: WI Stirling Engine invented during the Renaissance ?
Plausibility check: Stirling Engine invented in the early modern era
Could the Stirling Engine have been used rather than the Otto Engine ?
Plausibility check: Trains with Stirling Engines ?
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Earliest possible internal combustion engines ?
WI: Internal combustion engine never invented, but electric and steam engines still exist
WI: Ethanol vehicles the norm from early on ?
DBWI: Gasoline cars still used ?
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WI: Internal combustion engine never invented, but electric and steam engines still exist
WI the Ford Model T was electric ?
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Challenge: Renewables-fueled Industrial Revolution
If Babbage's Analytical Engine had been made, what could it have done ?
Challenge: Motor vehicles powered by turbine engines more widespread (since the 1950s/1960s)
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Points of Divergence : Steam Engines
Points of Divergence : Electricity
Points of Divergence : Transport and Vehicles
Points of Divergence : Industrial Revolution