Sam Tordoff won the opening British Touring Car Championship race at Thruxton from pole position, as second-place starter Jason Plato was relegated to 17th after a penalty.
The AmD Tuning driver's 0.4-second victory over Dan Cammish earned the team its third series win, all scored this season, and Tordoff's eighth - having last triumphed in the opening Silverstone race last season.
Tordoff had led the first race at Thruxton earlier in the year before an alternator failure sapped his car's power and dropped him behind Andrew Jordan.
This time around, Plato was a match for Tordoff off the line and attempted to pass for the lead around the outside on the run through to Allard. But as the pack headed on to the Complex, Tordoff's inside line meant he could edge ahead in the braking zone to consolidate first place.
Plato remained in Tordoff's tow for the remainder of the lap but was then was forced to serve a drivethrough penalty for a startline infringement.
The double BTCC champion had stopped his Vauxhall Astra with its front bumper ahead of the line denoting his grid slot - falling foul of a new regulation brought in for the 2019 season.
With Plato dropped to the back, it allowed the FK8 Honda Civic Type R of Dan Cammish to give chase after Tordoff - the latter driving the older FK2 ex-Team Dynamics Civic.
Tordoff crossed the line with a 0.843s advantage and although the race pace dropped, he held on to the victory as the 30kg of success ballast aboard Cammish's car hampered his pace on the abrasive asphalt.
Thanks to a change in engineering staff, the Ciceley Motorsport team's new-found pace carried over from Saturday, with Adam Morgan crossing the line third.
The Mercedes A-Class pressured Cammish for much of the final third but was unable to take advantage.
The BTC Racing FK8 Civic of Josh Cook was fourth, while a ballast-free Tom Oliphant bagged rear-wheel-drive honours for the BMW 330i M Sport in fifth place.
Plato's team-mate Rob Collard was sixth ahead of the second AmD Civic of Rory Butcher.
Matt Neal took advantage of Ashley Sutton's pass on Jordan through Church to climb to eighth.
Honda driver Neal had started in 17th, but when Sutton compromised Jordan's line he snuck through and then used his superior straight-line speed to demote the Subaru Levorg also.
Behind Sutton, the top 10 was completed by Chris Smiley with Tom Ingram in 11th.
Title contender Jordan and points' leader Colin Turkington struggled with their success ballast to 12th and 13th.
Plato eventually recovered to 17th.
Race one result
|1||Sam Tordoff||AmD Tuning||Honda||16||20m55.872s|
|2||Dan Cammish||Team Dynamics||Honda||16||0.403s|
|3||Adam Morgan||Ciceley Motorsport||Mercedes||16||0.714s|
|4||Josh Cook||BTC Racing||Honda||16||1.208s|
|6||Rob Collard||Power Maxed Racing||Vauxhall||16||4.660s|
|7||Rory Butcher||AmD Tuning||Honda||16||8.923s|
|8||Matt Neal||Team Dynamics||Honda||16||10.562s|
|9||Ash Sutton||BMR Racing||Subaru||16||10.863s|
|10||Chris Smiley||BTC Racing||Honda||16||11.446s|
|11||Tom Ingram||Speedworks Motorsport||Toyota||16||12.883s|
|14||Bobby Thompson||Team Hard||Volkswagen||16||17.272s|
|15||Ollie Jackson||Motorbase Performance||Ford||16||18.034s|
|16||Jake Hill||Trade Price Cars Racing||Audi||16||19.126s|
|17||Jason Plato||Power Maxed Racing||Vauxhall||16||22.321s|
|18||Aiden Moffat||Laser Tools Racing||Infiniti||16||25.134s|
|19||Stephen Jelley||Team Parker Racing||BMW||16||25.337s|
|20||Daniel Rowbottom||Ciceley Motorsport||Mercedes||16||25.837s|
|21||Matt Simpson||Simpson Racing||Honda||16||27.670s|
|22||Tom Chilton||Motorbase Performance||Ford||16||29.823s|
|23||Michael Crees||Team Hard||Volkswagen||16||38.288s|
|24||Jack Goff||Team Hard||Volkswagen||16||38.454s|
|25||Rob Smith||Excelr8 Motorsport||MG||16||39.463s|
|26||Nicolas Hamilton||Motorbase Performance||Ford||16||41.643s|
|27||Mark Blundell||Trade Price Cars Racing||Audi||16||46.446s|
|28||Sam Osborne||Excelr8 Motorsport||MG||16||48.601s|
|29||Senna Proctor||BMR Racing||Subaru||16||1m04.720s|
|30||Carl Boardley||Team Hard||Volkswagen||15||1 Lap|