Original sentence: Although Senna had more wins, he also had a string of retirements, many more than Prost, mostly down to engine failures while leading which cost him vital points.However Senna and Prost's combined points total meant McLaren easily won a second straight constructors' championship
Edited sentence: Although Senna won six races to Prost's four and usually finished ahead of the Frenchman in the races, accidents and car breakages meant that he had four fewer points-scoring finishes and finished 16 points behind his French rival in the championship.Senna and Prost's combined points total meant McLaren easily won a second straight constructors' championship