Testy Bishop’s Original
Európske testy
- TÜV – Motor Test Lab in Germany (Nemecko) – No. D4-TPT 351-051-86
- karr V motor – VW Golf-Rabbit (Nemecko) – Date of test 27.02.1979
- Cranfield Institute of Technology (Cranfield Anglicko) 5 Year Test
- Jordbrukstekniska instituten – Swedish Istitute of Agricultural Engineering (Švédsko) – Test
Americké testy