The Vauxhall UK chairman and MD says the car will soon outsell the Insignia and sit just below Corsa and Astra in the marque's sales charts.
"It is the most important car being launched for dealers," explained Aldred at the Geneva Motor Show. "It's a small SUV that has huge potential for us. The industry and consumer preferences are moving towards this type of car. It's practical, but fun and fresh in an affordable package.
"I expect next year – in its first full year of sales – it will become our third best selling model."
Aldred said the new model may even spawn a VXR version in the future, but at the moment that badge focus is on the new Astra VXR, which was also unveiled at the show.
"The Astra VXR is a pinnacle model for us," said Aldred. "It is a car that is perfect for the UK marketplace and the fact that Ford has chosen not to do a three-door version of the ST somewhat opens up the opportunity for us.
"We expect to sell more Astra VXR models than Volkswagen will manage with the Golf GTI three and five door models and Scirocco R combined. The VXR has a real place in buyers' hearts."
Mokka and the VXR are the start of a seven new model cycle for Vauxhall in the next 12 months, all of which Aldred believes will help close the gap on market leaders Ford.
"It's always nice to be number one and the gap has closed over the last eight years quite significantly," he explained.
"We can close the gap in three ways. Firstly in retail with our lifetime warranty being a paramount proposition. Secondly we make it affordable to purchase a Vauxhall with flexible finance products.
And then thirdly we have amazing new products with seven brand new cars coming in 12 months and that is a product gain that is unrivalled by anyone ever. Certainly in our 109-year history it's the most exciting time for us."