Photo: Malclom Griffiths/GP3 Series Media Service
GP3 driver Ralph Boschung has joined Koiranen for his second season in in the series, completing a full four-car line-up at the squad.
Boschung raced for Jenzer last year after stepping up from ADAC Formel Masters, finishing 11th in the standings and taking a podium in the Silverstone reverse-grid race.
He returned to Jenzer for the shakedown of the new GP3/16 car at Magny-Cours earlier this month but joined up with Koiranen in time for the start of proper pre-season testing at Estoril on Tuesday.
The 18-year-old Swiss driver joins?Matt Parry,?Matevos Isaakyan and?Mahaveer Raghunathan?in the line-up at Koiranen, which joins ART Grand Prix and Trident in taking advantage of the new rule permitting teams to run a fourth car?this season.
?I?m very excited to be joining Koiranen GP,” he said.
“They have shown great success over the last few years in GP3?which is very attractive as a driver point of view.
“I am really looking to get to work with the team and hopefully have a successful year together.?
GP3 2016 line-up so far
| Team | Drivers |
| ART Grand Prix | Nirei Fukuzumi,?Nyck de Vries,?Alex Albon, Charles Leclerc |
| Trident | Antonio Fuoco, Artur Janosz, Sandy Stuvik, Giuliano Alesi? |
| Arden International | Jake Dennis,?Jack Aitken,?Tatiana Calderon |
| Koiranen GP | Matevos Isaakyan,?Matt Parry, Mahaveer Raghunathan, Ralph Boschung |
| Jenzer Motorsport | Akash Nandy |
| Campos Racing | Alex Palou, Konstantin Tereshechenko, Steijn Schothorst |
| DAMS | Santino Ferrucci, Jake Hughes, Kevin Jorg |