I recently traded my Polo (1.4 75bhp, same model shape as yours) in for a Seat Ibiza Cupra.

Same size as the Polo, with sportier styling, VAG build quality, and a 1.8T engine giving out 156bhp (chippable to ~210bhp easily)!

Would beat the socks of a puny 206, and bits wouldn't keep falling off either!