Ever since the first Model 3 LR specs were released last month I’ve been pondering what potential the Model 3 might have in autocross. I figured comparing it the Model S would be the closest thing for a hypothetical comparison. I took a look at the 2017 SCCA Solo classification and see that the Model S is currently in F Stock (PAX index: 0.804). I believe that’s only for the non-D versions since the model years specified were 2012-2014 and I don’t see any other classifications for the Model S. Assuming that’s for the P85, that’s really good for a RWD car that size considering that BMW M3’s from 2006-2013 are also in F Stock. A very fast class indeed. Comparing the physical dimensions between the P85 and the 3LR: Model S P85 / Model 3 LR Length (in.): 196.0 / 184.8 Width (in.): 77.3 / 72.1 Wheelbase (in.): 116.5 / 113.2 Size wise, the Model 3 has a significant advantage over the Model S on an autocross course. The CG’s should roughly be the same since they’re the same height (56.8 in.). Since they use the same battery layout their weight distribution should roughly be the same also (Model 3 F/R: 48% / 52%). The P85 has a substantial power advantage over the 3LR: Motor / 0-60 mph Model S P85: 416hp / 443 ft-lbs / 4.4 sec Model 3 LR: 258hp / 318 ft-lbs / 5.1 sec (TBD) But, the 3LR is 948 lbs lighter: Model S P85: 4,785 lbs Model 3 LR: 3,837 lbs The P85 runs a much wider tire package than the 3LR: Front / Rear Model S P85: 245/35-21 / 265/35-21 Model 3 LR: 235/40-19 / 235/40-19 There are more tire options for Model 3 in 19’s and it would be legal to go down to 18’s for even more options. Would the Model 3 have good potential for autoX? Would it be as quick as the Model S P85? Could it potentially turn better times than the Model S P85? What other attributes should be considered in an autocross stock class comparison?