Sutton ensured his commanding points lead remains intact ahead of next weekend's Brands Hatch finale by impressively storming from 23rd on the grid to win the second Northamptonshire contest.
The remarkable performance was his 10th win of a record-breaking season and also means he has jumped five places up Autosport's winners' table into 19th.
That is two positions ahead of his BTCC rival Hill, who prevailed in the dramatic opening race when a decision to use wet-weather tyres paid off handsomely. He, in turn, has risen six spots on the leaderboard.
But both drivers are still six wins behind table-topper Ryan McLeish with no one inside the top 18 making any inroads into the Legends racer's advantage.
Joining Sutton and Hill on 10 wins for the year is Dan Zelos, the Mini Challenge dominator scoring another two successes at Silverstone to move from 34th to 22nd.
Also enjoying a strong weekend was Phil Wright, who twice topped a thin Racing Hondas field at Brands Hatch to leap from outside the top 50 into 30th.
That is three places ahead of Scott Parkin, who picked up two class wins in his VW Golf at Donington Park (in Roadsports and Club Enduro) to similarly re-enter the table.
Source: Autosport