Airshow
'Wings & Wheels' at Dunsfold, Surrey might suit you.
Though still largely an airshow - this is where Harriers, Hawks ( inc the Red Arrows who attend ) Hunters etc were all built before BAe closed it in 2000.
It's run in conjunction with Brooklands Museum, who bring a lot of their exhibits both aviation & motoring.
As well as the air display ( which is very good, Spitfires & Hurricanes, B of B flight, Harrier, Red Arrows, aerobatics etc ), there are plenty of static historic & modern aircraft one can actually walk around.
More to the point for you perhaps, interesting vehicles, old & new racing cars aplenty - including a high speed procession down the runway - and things like cars from Bond films, the Napier Railton vintage monster high speed car, Chitty Chitty Bang Bang ( or a good replica ) was there to stroll around last year, & plenty of military vehicles etc.
Also the usual small fun fair stuff for toddlers.
I think it's August Bank Holiday this year but if you dial up Dunsfold Park on google etc it'll come up. ( if of interest, it's where 'Top Gear' is filmed too ).
I'm not working for them - just did when it was a great place to work building & testing aeroplanes before BAe rot got to it...at least it's not covered in houses - yet...
Tickets are not cheap - £20.00 per adult, though £10.00 for WW2 veterans if like last year ( and if the ticket people have actually been told this year ! ).