I've not thought this through.
IGP Manager is not just a racing game, but it's also partly a building and managing game.
A maxed out car is worth 1,600 points.
At the start of a season we should build the car's we want using 800 points.
Then we get 25 points at the end of each race to edit the car for the next race on the calendar.
It's not adding 25 points, it's just reallocating 25 points, from this to that of the car.
Tyre Economy - almost 3 extra laps of life in tyres with 200
1 = 0.0
25 =0.3
50 =0.6
75 =0.9
100=1.3
125=1.7
150=2.1
175=2.4
200=2.9
Fuel Economy - almost 3litres less fuel with 200
1 = 0.0
25 =0.2
50 =0.4
75 =0.6
100=1.0
125=1.4
150=1.8
175=2.2
200=2.7
Cooling - 1 engine will last 4 races with 200
1 = 0.0
25 =0.5
50 =1.0
75 =1.5
100=2.1
125=2.7
150=3.3
175=3.9
200=4.6
Reliability - 4 less parts for repairs with 200
1 = 0.0
25 =0.5
50 =1.0
75 =1.5
100=2.0
125=2.5
150=3.0
175=3.5
200=4.0
Handling
Downforce
Acceleration
Braking
Would also be split into 25's with 200 being the best of each area.