To begin, I’ve included the following biographies introducing the top drivers of each of the five manufacturers that will be represented in the race at Sonoma.
First, Chevrolet races the Cruze, a model that has dominated the series in recent years with champions Yvan Muller and Rob Huff. BMW campaigns the 320TC, a racing version of the 320si updated last year with a kit from BMW Motorsport. Spanish manufacturer SEAT races the compact Léon. The Honda Civic returned to FIA competition this year for the first time since Honda pulled out of Formula One. Most unique is Russian manufacturer LADA, which introduced its small Granta Sport model this year.
All the cars are the four-door two-wheel drive models which run a 1.6 liter turbocharged engine with a six-speed sequential gearbox.

#1
Driver: Rob Huff
Born: December 25, 1979 - Cambridge, United Kingdom
Manufacturer: SEAT León WTCC
Team: ALL-INKL.COM Münnich Motorsport
Teammates: #37-René Münnich, #38-Marc Basseng
WTCC Wins: 24
Most Recent Win: 2013 - Hungary Round 8
Current Points Position: 5th (-173 behind leader, -7 behind 4th)
Best 2013 Finish: 1st (Hungary Round 8)
2012 Sonoma Finishes: 2nd, 1st
Known as “Huffy” to his fans, the 2000 Formula Vauxhall Champion and 2003 SEAT Cupra Champion scored two wins in the British Touring Car Championship before he moved to the WTCC during the debut season in 2005. In the seven years since, he has racked up 24 victories, second-most among this year’s field, trailing only his former Chevrolet teammate Yvan Muller. He is one of just four active drivers to have competed in every WTCC season since 2005, joining Gabriele Tarquini, Tom Coronel, and Stefano D’Aste.
This season, Huff left Chevrolet’s factory team for Spanish manufacturer SEAT and the three-car ALL-INKL team owned by owner-driver René Münnich. Huff started last in the field for the season opener in Italy, then rallied to a 6th place finish despite horrendous wet conditions. While running 3rd in Morocco’s Round 4, he pulled a banzai move into the last corner of the first lap, but ended up locking up his brakes so hard that he lost a half-dozen spots and pulled into pit road. In Round 5 at Slovakia, he ran wide in the first corner on Lap 4, but barely managed to get back on track. His lone victory this year came on the Hungaroring, where he prevailed in a tight battle with the BMW of Mehdi Bennani. In Round 9, he also made a dramatic save after contact from James Thompson on Lap 9, holding onto the 7th spot in the process. In Round 16 in Argentina, Huff broke a right-front wheel on Lap 7 and slid off course, ending up last in the field.
Coming into the Sonoma race last year, Huff was just 17 points behind Muller for the championship lead. Both drivers claimed a victory that weekend. Huff’s came at the cost of Muller, who suffered a drive-through penalty for spinning Franz Engstler from the lead, and they left the race tied for the point lead. At season’s end, it was Huff who claimed the title, the first of his career. Following his early exit in Argentina, the defending driver’s champion comes into Sonoma this year 5th in points, 173 points behind Muller, but is hungry to claim his second victory of the season.

#3
Driver: Gabriele Tarquini
Born: March 2, 1962 - Giulianova, Italy
Manufacturer: Honda Civic WTCC
Team: Castrol Honda WTC Team
Teammate: #18-Tiago Monteiro
WTCC Wins: 18
Most Recent Win: 2013 - Slovakia Round 5
Current Points Position: 3rd (-146 behind leader, -14 behind 2nd)
Best 2013 Finish: 1st (Slovakia Round 5)
2012 Sonoma Finishes: 4th, 3rd
A Formula One racer for six different teams in 38 career starts, a champion in both the British and European Touring Car Series, and the 2009 WTCC Champion, Tarquini is the oldest and most experienced driver in the series today. Tarquini left the Lukoil Racing Team after 2012 to drive for Honda as the Lukoil team switched from Spanish manufacturer SEAT to LADA, a Russian mark. Tarquini and his Honda had a great start to the 2013 season with a 4th and a 3rd in the first two races in Monza, followed by a runner-up finish in Round 3 in Morocco. In the next race, he was running in the points on the street course when he went off-line through a chicane on Lap 9 and rammed a rogue curb on the exit, sending him sliding into Alex MacDowall and taking both out of the race.
Tarquini rebounded in Round 5 to take the win in Slovakia, leading teammate Tiago Monteiro in the Honda team’s first 1-2 finish. In Round 8 in Hungary, he suffered a spectacular crash on the opening lap, catching air as he was turned into a tire barrier, then bounced into the path of Franz Engstler’s BMW, taking both cars out of the running. In Round 13 in Portugal, Tarquini was running in the 4th spot on Lap 8 when a burnt turbo sent out a huge plume of smoke, taking him out of the race once more. He managed just a 20th place finish in Round 14, slipping from from 2nd to 5th in points. In Round 15 in Argentina, Tarquini was running 3rd on the first lap when he ran off-course near the end of the first lap and slipped to 7th by the stripe. He rallied to finish 4th in that race and in Round 16, and he again finds himself 3rd in the standings headed to Sonoma. Now 14 points behind 2nd place Michel Nykjær, Tarquini looks to close the gap even tighter these final eight races, starting in the Napa Valley.

#7 (Y)
Driver: Charles Kaki Ng
Born: August 1, 1984 - Hong Kong
Manufacturer: BMW 320 TC
Team: Liqui Moly Team Engstler
Teammate: #6-Franz Engstler
WTCC Wins: 0
Current Points Position: 21st (-311 behind leader, -3 behind 20th)
Best 2013 Finish: 10th (Morocco Round 4)
2012 Sonoma Finishes: 15th, 21st (DSQ)
One of the most personable drivers on the circuit is third-year driver Charles Ng, who took the unusual path through the world of professional drifting, including two years of the Formula D Pro Championship and one with Evasive Motorsports. After scoring the 2010 Asian Touring Car Championship, followed by a successful run through the Pacific tour late in the 2011 WTCC season, sponsor Liqui Moly upped its support, scoring Ng a ride as Franz Engstler’s teammate in the BMW camp. Though Ng has improved in this, his second season on the tour, including an outside-pole in Russia’s Round 12, early crashes have kept him down in the standings.
Sonoma, with its short straightaways and tight turns, offers the opportunity for retribution as Ng was running in the points last year before a controversial black flag for a loose bumper left him at the tail end of the field. This year, Ng and Engstler look to turn some heads in the Napa Valley.

#10
Driver: James Thompson
Born: April 26, 1974 - York, United Kingdom
Manufacturer: LADA Granta Sport
Team: LADA Sport Lukoil
Teammate: #8-Mikhail Kozlovskiy
WTCC Wins: 4
Most Recent Win: 2008 - Imola Round 18
Current Points Position: 15th (-283 behind leader, -6 behind 14th)
Best 2013 Finish: 5th (Russia Round 11)
2012 Sonoma Finishes: FIRST SONOMA START
A two-time champion of both the European Touring Car Cup and the British Touring Car Championship, two of the seven series in which he’s competed since 1994, Thompson has one of the most impressive resumes in the WTCC garage. He won one of the first WTCC races ever run at Monza in 2005 and now runs for Russia’s LADA team, a program he helped develop on a part-time basis in 2009 and 2012. Following his disastrous run-in with then-teammate Aleksei Dudukalo in Monza, he bounced back with a 10th in Morocco and has made every race since.
The 2013 season has been a physical one, but the LADA has carried Thompson to four top-ten finishes in his last eight starts, including a season-best 5th in Russia’s Round 11. Looking for more in Round 12, he pulled a dramatic four-wide pass on the main straightaway, making full use of the run-off as he swung to the outside of Gabriele Tarquini, Tom Coronel, and Rob Huff. Something had to give, and unfortunately a tangle between Tarquini and Coronel stuffed Thompson into the outside wall, ending his race. Though he struggled in the series’ most recent race in Argentina, falling out of both races, his 6th-place runs at the equally challenging street course in Portugal may indicate a good run for him on Sonoma’s road course.

#12
Driver: Yvan Muller
Born: August 16, 1969 - Altkirch, France
Manufacturer: Chevrolet Cruze 1.6T
Team: RML
Teammate: #23-Tom Chilton
WTCC Wins: 36
Most Recent Win: 2013 - Argentina Round 15
Current Points Position: 1st (leading by 132 points over 2nd)
Best 2013 Finish: 1st (Italy Round 1, Italy Round 2, Hungary Round 7, Russia Round 11, Portugal Round 13, Argentina Round 15)
2012 Sonoma Finishes: 1st, 14th
Dominant in a way few drivers have ever accomplished, Muller has become the gold standard in the WTCC. After racking up 36 wins in the British Touring Car Series from 1998 through 2005, including the 2003 championship, Muller made the move to the WTCC and picked up right where he left off. He’s scored another 36 wins in that time, including three of the last five championships, and he’s leading by an impressive margin on his way to title number four. With a series-leading six race wins this season, including the year’s only weekend sweep in the rain-soaked opener in Italy, “The Teflon Man” now leads by 132 points.
Muller has been so dominant in 2013 that his 13th-place finish earlier this month in Argentina - which could have been a 2nd-place finish but for a penalty for punting Tiago Montiero out of 2nd on Lap 5 - was his first finish worse than 7th since last season in China, eighteen races ago. Fresh off his sixth win of the season back in Argentina for Round 15, Muller storms into Sonoma, where he nearly pulled the sweep in 2012 before he was again penalized for spinning Franz Engstler from the lead in Round 18.
Next year, Muller will be driving for Citroën in the French make’s first-ever start in the series. It could spell trouble for the rest of the field - his teammate will be Sébastien Loeb, who’s been equally untouchable in the World Rally Championship the last nine years.
(Y) indicates the driver is a contender for the Yokohama Cup, an additional championship reserved for the WTCC's independent drivers.