SAO PAULO, Brazil - The next generation of F1 car could be very difficult to drive, Ferrari's Fernando Alonso and Felipe Massa said on Thursday (Nov 21).Insiders say the transition between the V8 era and the beginning of the turbo-powered era in 2014 is perhaps the biggest rule change in F1's entire history.'DRIVING IN THE RAIN'Alonso said he has tried an early version of Ferrari's 2014 car in the team's Maranello simulator. He told Italy's Autosprint in Brzail: "When I tried it for the first time, it was really difficult to drive."But each new simulation changes everything so I am sure it will be very different by Melbourne."Massa, despite the fact he is joining Williams for 2014, revealed he too has tried thew new Ferrari in the simulator.Massa said: "It's a different world to 2013. There is so little grip, it's like driving in the rain." Stay with Wheels24 for the 2013 Brazilian GP weekend.