Volvo says that, by lowering the suspension by 10mm, stiffening the springs and revising the steering, it has made the C30 a much more agile and rewarding car for enthusiastic drivers.
80 per cent of C30 buyers choose R Design trim, which brings a unique bodykit, 17-inch alloy wheels and a tailgate spoiler.
The interior has a sporty makeover, with sports seats, a leather-trimmed steering wheel, aluminium pedals and blue gauges.
The first C30 R Design models with the new chassis should be delivered to customers early next year. Exact prices and specifications will be confirmed nearer to the on-sale date.