I cannot answer your question directly but I recently had a 4 wheel alignment done on my RRS. The car had done just under 150,000km and was 11 years old - covered the usual mix of roads - bush tracks, outback gravel, highways, secondary roads with those big pot holes and of course suburban curb crawling.
When the alignment was done it was noted my car had taken a major hit and the front tongue of the front mount of the drivers lower suspension arm was bent.
However despite all this - the alignment was still within specifications on all four wheels - admittedly approaching the limits but still within limits.
The reason for the alignment - all four tyres had worn on the inside and I was getting new tyres.
So the alignment should last a long time but clearly depends on individual circumstances and use.
Garry
REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
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