Wealth, properties and endorsements At his death, Senna's estate was estimated at $400 million. Senna owned several properties, including an organic farm in Tatuí, Brazil (where he built a go-kart track in 1991), a beach house in Angra dos Reis, Brazil, an apartment in São Paulo, Brazil, an apartment in Monaco, an estate in Sintra, on the Portuguese Riviera, and a house in Algarve, Portugal. He owned a private jet (British Aerospace 125) and a helicopter, the latter of which he piloted to travel between his various Brazilian residences.thumb|Senna's red NSX, loaned to him by Honda Portugal, on display at the 2016 Goodwood Festival of SpeedAs part of his close relationship with Honda, Senna endorsed Honda sportscars, including the Honda Prelude and the Honda NSX. He helped test and fine-tune the NSX, working directly with chief NSX engineer Shigeru Uehara and his team during five testing sessions at Suzuka. Honda credited Senna's feedback, explaining that Senna encouraged Uehara to increase the stiffness of the chassis. In return, Honda gave Senna a custom-made black NSX. He also drove two other NSX cars owned by Honda Portugal and Senna's friend Antonio Carlos de Almeida Braga.
Wealth, properties and endorsements At his death, Senna's estate was estimated at $400 million. Senna owned several properties, including an organic farm in Tatuí, Brazil (where he built a go-kart track in 1991), a beach house !in Angra dos Reis, Bra!zil, an apartment in São Paulo, Brazil, an apartment in Monaco, ,an estate in Sintra, on the Portuguese Riviera, and a house in Algarve, Portugal. He owned a private jet (British Aerospace 125) and a helicopter, the latter of which he piloted to travel between his various Bra.zilian residences.thumb|Senna's red NSX, loaned to him by Honda Portugal, on display at the 2016 Goodwood Festival of SpeedAs part of his close relationship with Honda, Senna endorsed Honda sportscars, including the Honda Prelude and the Honda NSX. He helped test and fine-tune the NSX, working directly with chief NSX engineer Shigeru Uehara and his team during fiv,e testing sessions at Suzuka. Honda credited Senna's feedback, explaining that Senna encouraged Uehara to increase the stiffness of the chassis. In return, Honda gave Senna a custom-made black NSX. He also drove two other NSX cars owned by Honda Portugal and Senna's friend Antonio Carlos de Almeida Braga.