TO B 51446 only participated in international races of the international rally and speed championship (former name of the World Championship). She raced for 4 years in competition for the Lancia factory and had 4 overall victories and 8 rankings among the top 5. It was driven by Munari-Balestrieri-Kallstrom-Fall-Barbasio-Ireland, but above all by Simo Lampinen who won two overall victories with this car. She also raced for the Scuderia Grifone of Genoa for 2 seasons, with the registration number GE 569523.
-
August 19/23 1969 – 84 hours of the Nurburgring – Le Marathon de la Route
- Crew : Ireland – Paganelli – Balestrieri
- Retired after 12 hours, after leaving the road with Paganelli at the wheel.
-
October 16/19 1969 – Rally of Spain
- Crew : Kallstrom – Haggbon
- Overall victory
-
November 15/19 1969 – RAC Rally
- Crew : Munari – Davenport
- Retired due to a technical problem, after having been in the lead after the first 12 special stages.
-
January 16 1970 – Monte-Carlo Rally
- Crew : Fall – Sodano
- Retired due to a technical problem (broken left suspension), 8th overall at the time of retirement.
-
February 11 1970 – Rally of Sweden
- Crew : Lampinen – Davenport
- Retired. Note : before the race, the car replaced the Fulvia TO B51443 whose engine did not start.
-
May 3/7 1970 – Tulip Rally
- Crew : Barbasio – Mannucci
- 3rd overall. The car was in the lead… but the crew took the wrong road and consequently lost 2 places.
-
May 22/24 1970 – Rally Wiesbaden
- Crew : Barbasio – Mannucci
- Retired after leaving the road
-
October 1/4 1970 – Rallye of Portugal (TAP Rally)
- Crew : Lampinen – Davenport
- Overall victory
-
November 14/18 1970 – RAC Rally
- Crew : Lampinen – Davenport
- Retired, due to technical problem (broken gearbox).
-
March 14/17 1971 – Rallye of Italy – Rallye San Remo
- Crew : Barbasio – Sodano
- 3rd place overall.
-
April 24/25 1971 – Rallye 999 Minuti
- Crew : Barbasio – Sodano
- 3rd place overall.
-
June 3/5 1971 – Rally of the 4 Regions
- Crew : Lampinen – Davenport
- Overall victory
After her career with the factory, she was sold to Amilcare Balestrieri on September 27 1972.