Terranova began racing professionally in 1997 as an enduro rider. He claimed four Argentine national titles and placed third in the Latin America enduro championship in 2001, that same year taking silver in the International Six Days Enduro. In 2003 he repeated his ISDE silver-medal result and added victories at the Chilean Rally del Desierto and the production car category of the Por las Pampas Rally in Argentina.
Terranova entered the Dakar Rally in 2005 and again in 2007, both times aboard a KTM, but retired on each occasion without finishing. Following the cancellation of the 2008 edition and the event's relocation to South America in 2009, he chose to make the switch from motorcycles to four-wheeled competition.
His first car campaign in 2009, piloting an X-raid-prepared BMW X3 alongside co-driver Alain Guehennec, ended in retirement, though he did take victory that year at the Tunisian Rally. In 2010, co-driving with Pascal Maimon in a Mitsubishi Racing Lancer, he completed the Dakar for the first time, finishing ninth overall. Back with X-Raid in 2011, he rolled his X3 out on the seventh stage. In 2012, competing in a Toyota, he again failed to finish after co-driver Andy Grider quit the rally on the fourth day following a dispute. That season he compensated with wins at two Dakar Series-sanctioned events: the Desafio Litoral and the Desafio Ruta 40, the latter alongside co-driver Paulo Fiuza.
Terranova's 2013 Dakar was his strongest to that point: returning to X-Raid and BMW machinery, he finished fifth overall and won Stage 10. He also claimed the Moroccan Rally that year. In 2014 he again placed fifth, driving a Mini. The 2015 edition produced four stage victories alongside an 18th overall. Results of 12th in 2016 and 6th in 2017 followed, with 2018 bringing 20th place and 2019 ending in retirement on Stage 2. He returned to 6th in 2020 before a 2021 retirement on Stage 6.
Terranova joined the Bahrain Raid Xtreme team, competing in a Prodrive Hunter T1+ car powered by a Ford Ecoboost V6. At the 2022 Dakar Rally his result of 4th overall, confirmed in the FIA's final W2RC standings, represented his best career finish at the event. He won Stage 6 of that rally. A 2023 retirement on Stage 4 followed. His hobbies are listed as cycling and enduro, reflecting a lifelong affinity with two-wheeled sport that predates his car career. Terranova's sustained presence across more than fifteen Dakar entries, initially on motorcycles and then across multiple manufacturers' programmes in the T1 car category, has made him one of the most experienced South American competitors in the history of cross-country rallying.