Not exactly racing, but...
Lord Montague's Car Magazine published an annual Road Book, and I have a 1910 edition--sort of road atlas plus gazetteer of things important to motorists (pubs, hills, where you can get batteries, where you can get fuel, tyres, mechanics etc.
At the very back is this cheering little feature:
The Chief Hills in England
Many motorists wish to try their cars at hill-climbing, and the appended list of good test hills may, therefore, be of use to them.
Birdlip--1 in 7--Gloucester 6.5 miles -- Cirencenster-Faringdon Rd
Broughton--1 in 11--Nottingham 14 3/4 miles--Nottingham Kettering Rd
The 'Broughton' reference must be Upper Broughton on the A606, known round here as the Melton Road / Nottingham Road. Heading north-west towards Nottingham, it is a short winding climb out of the village towards Hickling Pastures, not far from the A46 Fosse Way, and the Old Dalby railway test track.