In message , Christopher A.
Lee writes
When I was a computer field engineer, we all had company cars - it was
a requirement, not just a perk, because we needed to get to places
quickly and reliably.

Like yours, it was based on leasing cost - and the managers had the
most expensive and luxurious cars while we plebs who really needed them
had the lesser ones.

When I had one, it was tax-deductible,

Do you mean the opposite - it was a charge on your personal tax.

but most of us did so many miles that was reduced (half AFAIR).

Above some threshold of business miles (?5k/yr perhaps) it was decided
that you really did need it to do your job. 100 miles less, and you
obviously didn't.

ISTR it was also lower on a car less than 1800cc.

There have been several schemes, many of which placed a greater envy-tax
upon drivers of higher-cc models than lower ones.
--
Roland Perry