While I like the WagonR (It's the only PS car I'd actually consider buying!); I don't think it's built to cruise comfortably on the highways at 100km/h, complete with 4 passengers and air conditioning!
- It's tires are real skinny!! Thin tires = low traction = better fuel economy.
- It's feather weight at just 835 kilos!
- It's very tall which means it has a very high center of gravity. Couple this with skinny tires and feathery weight and you're basically looking at a death trap!
- The engine is kinda underpowered and makes just 68HP at a staggering 6,200RPMs. So you won't have much passing power in reserve at highway speeds. Besides, I think the engine will be revving beyond 3,500RPMs at just 80km/h, but do correct me if I'm wrong.
Long story short: DO NOT take your WagonR on the highways! Bad idea.