Nestor Girolami beat Munnich Motorsport team-mate Esteban Guerrieri to the fastest time in opening World Touring Car Cup practice at the Hungaroring, as Hondas locked out the top three spots.
Girolami dragged his Honda Civic Type R to a fastest time of 1m53.919s moments before the chequered flag was shown at the end of the 45-minute session to deny Hungarian teenager Attila Tassi the fastest time.
Guerrieri - who lies second in the drivers' standings after the Marrakech season opener - then snuck into second with his final lap of the session, ending up 0.124 seconds slower than team-mate Girolami.
Tassi held on to third in his KCMG Honda with a best time of 1m54.286s at the venue where he claimed both TCR International Series wins in 2017 and last year made his WTCR debut.
Jean-Karl Vernay put his WRT Audi RS3 LMS fourth, ending up more than half a second adrift of the benchmark time, 0.003s ahead of the Comtoyou Racing Cupra of Aurelien Panis - who sat out the final 15 minutes of the session after he was shown a black flag for track limits.
Panis still ended up fifth ahead of team-mate Tom Coronel, while early pacesetter Norbert Michelisz was seventh in the fastest of the BRC Racing Hyundai i30 Ns.
Three-time World Touring Car champion Andy Priaulx - who has never raced at the Hungaroring previously - was eighth in the best of Cyan Racing's Lynk & Co 03s, ahead of Augusto Farfus (BRC Hyundai) and the fourth Honda of Tiago Monteiro.
Kevin Ceccon was the faster of the two Team Mulsanne Alfa Romeo Giuliettas in FP1 in 13th, ending up six places and half a second clear of team-mate Ma Qing Hua.
The Volkswagen Golf GTI appears to be struggling for a second round in a row.
Rob Huff was once again the fastest of Sebastien Loeb Racing's quartet of drivers in 15th, with double World Rallycross champion Johan Kristoffersson 21st.
Mehdi Bennani and Benjamin Leuchter were 25th and 26th and slowest of the full-season WTCR drivers, ahead only of wildcard entrant Tamas Tenke - driving a Cupra for the Hungarian Zengo Motorsport squad, a previous stalwart of World Touring Cars.
While the air temperature was around 27C for FP1, rain is expected to arrive overnight and affect FP2, qualifying and the opening race on Saturday.
A TCR Balance of Performance bulletin issued after FP1 confirmed the four Golfs - which are all running the common TCR ECU that will be used by all cars from 2020 - have been given a weight break of 10 kilograms. All other WTCR cars remain unchanged.
|1||Nestor Girolami||Munnich Motorsport||Honda||1m53.919s|
|2||Esteban Guerrieri||Munnich Motorsport||Honda||0.124s|
|5||Aurelien Panis||Comtoyou Cupra||Cupra||0.591s|
|6||Tom Coronel||Comtoyou Cupra||Cupra||0.609s|
|7||Norbert Michelisz||BRC Squadra Corse||Hyundai||0.657s|
|8||Andy Priaulx||Cyan Performance||Lynk & Co||0.725s|
|9||Augusto Farfus||BRC Racing Team||Hyundai||0.815s|
|11||Niels Langeveld||Comtoyou Audi||Audi||0.989s|
|12||Frederic Vervisch||Comtoyou Audi||Audi||0.999s|
|13||Kevin Ceccon||Team Mulsanne||Alfa Romeo||1.104s|
|14||Mikel Azcona||PWR Racing||Cupra||1.203s|
|15||Daniel Haglof||PWR Racing||Cupra||1.261s|
|16||Gabriele Tarquini||BRC Squadra Corse||Hyundai||1.262s|
|17||Rob Huff||SLR VW Motorsport||Volkswagen||1.275s|
|18||Yvan Muller||Cyan Racing||Lynk & Co||1.461s|
|19||Ma Qinghua||Team Mulsanne||Alfa Romeo||1.649s|
|20||Thed Bjork||Cyan Racing||Lynk & Co||1.667s|
|21||Johan Kristoffersson||SLR Volkswagen||Volkswagen||1.670s|
|23||Nicky Catsburg||BRC Racing Team||Hyundai||1.892s|
|24||Yann Ehrlacher||Cyan Performance||Lynk & Co||2.055s|
|25||Mehdi Bennani||SLR VW Motorsport||Volkswagen||2.276s|
|26||Benjamin Leuchter||SLR Volkswagen||Volkswagen||2.727s|
|27||Tamas Tenke||Zengo Motorsport||Cupra||5.261s|