Re: Not ready.
"An interesting article on the first vehicles to climb the Sani Pass in South Africa/Lesotho - including a VW Beetle. It also records the repeat run with a modern front-wheel drive VW 60 years later - by which time the road had had some of the steeper parts flattened out to no worse than 1:3. It is still 2800 metres high - not a lot of oxygen for engines up there. Third set of carburettor jets in an old Landrover."
Back around 1970 when my Dad worked for the Dept of Public Works in Papua New Guinea, he settled the question the question of which truck the Dept should buy with a race over the Kassam Pass. Sea level to 1,500m (~5000ft) in about 10km. That's about the same climb as Sani but in a quarter the length (near as I can find). On the other hand, you start at sea level rather than 1500m and there's a good, paved road over Kassam.
For the record, Isuzu's (then) shiny new turbo diesel won.