| Jaguar | Model Year | Closest distance between forward towers - (M1) | Distance from uppermost windshield to forwardmost tower foot - (M2) | Closest distance between rear towers - (M3) | Crossbar spread distance center to center - (M4) |
| XJ Series Sedan | 95/96 | Q30 - 42" | 6" | Q31 - 41 1/8" | 36" |
| XJ Series Sedan- Max Crossbar Spread | 95/96 | Q30 - 42" | 6" | Q31 - 41 1/2" | 40" |
| XJ6 Sedan | 87/94 | Q30 - 43 1/8" | 6" | Q31 - 41 3/4" | 36" |
| XJ6 Sedan | 79/86 | Q30 - 40 5/8" | 6" | Q30 - 40 3/4" | 36" |
| XJS Hardtop Coupe | 79/95 | Q24 - 38 1/4" | 6" | Q24 - 37 1/4" | 32" |
