Will a hybrid car still give good mpg on long journeys and country roads?

I currently drive a 2011 Fiat Bravo Multijet diesel - I bought it for the MPG and it hasn't disappointed in that regard, although it's irritatingly unreliable and handling isn't great. Despite living in the city centre I regularly commute 200+ miles on both motorways and country roads. The Fiat is living up to it's 'Fix It Again Tomorrow' joke - and I'm worried about taxes coming in on diesels as I regularly work in cities. I need a car that can handle both motorway driving and tricky country roads. I've been looking at hybrids hoping I could get a similar MPG to the diesel, but all the reviews say they're not great on motorways and country roads. Should I give up and go for a petrol engine or take the risk with a diesel? I'm looking for something under £20,000.
In 2004 I had a Toyota Prius II and its overall average over 3776 miles was 48.83mpg, which wasn't so great. Then in In 2011 had to deliver an Auris hybrid 300 miles, mostly motorway, and it did 63mpg, so they got better. Phenomenal reliability. Low maintenance costs. I'd go for the lighter Toyota Auris rather than the Prius.
Answered by Honest John

Ask Honest John