Which version of the 1.9 diesel is fitted to yours? The engine code [F9Q-???] would help. Going by similar Renault faults; it sounds like the engine management's gone into "limp-home" after detecting a fault. Your best bet is to find a local garage that can read the fault-codes and get some idea of what's upsetting it.
Stuck-open/end broken off EGR valve; blocked particle filter; fuel-rail pressure sensor; high/low pressure pumps/relays; seized turbo; split intercoolers; bad connexions/earths; wiring faults - all sorts are possible on these.
Vauxhall has announced that its new city car will be called the Viva, reviving a much-loved badge. We look at ten classic car comebacks and wonder if the fans got what they wanted, or if they’d have been better off leaving the badge in the bottom drawer.