FIA chief Nikolas Tombazis has predicted Formula 1 cars will be up 🗹to “one and a half seconds” slower in 2019 compared to this year with the regulation changes aimed to increase overtaking in the sport.

Tombazis, who replaced Renault-bound Marcin Budkowski as the FIA’s technical chief for single-se💙aters, has welcomed the decision to tweak next season’s F1 aerodynamic regulations for 2019 which were voted for by F1 teams during the build-up to the Spanish Grand Prix.

The rule changes will see simpler front wings and front brake ducts while increasing t😼he size of the rear wings with the goal of increasing overtaking opportunities. Having assessed the impact of the technical changes, Tombazis predicts F1 cars will be significantly slower compared to this year.

“We expect this change to be approximately halfway or one third of the way less performance of the delta between ‘16 and ‘17 so we expect to about lose one and a half seconds maybe,” Tombazis said. “That sort of border but it is a bit difficult to predict exactly the amount of development the teams will put on but we certainly expec꧃t to lose performance, but that sort of magnitude.”

The FIA boss also conceded the rule changes are considered aﷺ “halfway house” in preparation for the 2021 rules shake-up which is currently being investigated by Liberty Media with the project he꧟aded up by Ross Brawn.

Tombazis has warned the 2019 ruleꦺ tweaks are independent to the ongoing work for the 2021 changes but feels a short-term chaꦺnge was required.

“These regulations for 2019 where an extract of some of the lessons learned already at Formula 1 and obviously they had to be implementable for 2019 so they only🦂 covered specific areas of the car which are a bit more simple,” he said.

“The underlying lessons that we have learned with F1 about how the cars perform𒆙 in the wake of othe🔴r cars but let’s say it’s only a halfway house.

“I don’t want it to be confused with the work that has gone on for 2021 and the future, which obvioꦺusly is going to be more extensive and hopefully have mucಞh more time for research.”