Nissan has an international product lineup, and sometimes, there are two vehicles in the same segment available in different parts of the world. For example, when the Infiniti G35 debuted in the United States for the 2003 model year, it replaced two cars in the global range. The G35 took over for the Infiniti G20 in the United States and the tenth-generation Nissan Skyline (known internally as the R34) in Japan. They were two inherently different models but shared a fundamental similarity as compact premium sedans with a bit of sportiness.The G35 was a huge success for the Infiniti brand. It's the model that brought some serious credibility to the brand, not only rivaling other luxury Japanese brands, but also the coveted German sports sedans. The combination of performance and affordable purchase price has made the G35 a popular first enthusiast car for many young buyers. The American Skyline G35 InfinitiNissan launched the Infiniti G35/11th-generation Nissan Skyline in 2002. The rear-wheel-drive (or all-wheel drive, later), V6-powered G35 was a huge departure from the front-drive, four-cylinder-powered G20.The engine, as the model name suggested, was a 3.5-liter V6, while Japanese Skylines offered 2.5-liter and 3.0-liter powerplants as well. Power output in the G35 was exceptional, with early models producing 260 hp and 260 lb-ft, making it a powerful luxury compact sedan by the standards of the early 2000s.BMW and Mercedes-Benz couldn’t hold a candle to the performance levels of the G35, with the 3 Series and C-Class maxing out at 225 hp and 215 hp, respectively. Only the high-performance M and AMG models could outperform the G35.Coupe versions of the G35 were even more powerful, making 282 hp and 270 lb-ft. Plus, manual transmissions were available on both sedans and coupes. In 2005, a facelift further improved the G35’s performance, with manual models producing 298 hp and automatics 280 hp. These were impressive figures for the era and outclassed most of the competition.Infiniti also beat BMW and Mercedes in pricing, as the G35 started at around $29,000 while comparable German models were about $5,000 more. G37 InfinitiThe 2007 model marked the arrival of the 12th-gen Nissan Skyline or the second-generation G-Series. The 2007 and 2008 models still used the 3.5-liter V6 in North America, producing 306 hp. In 2009, the G37 arrived, switching to a 3.7-liter V6 that produced 328 hp in the sedan and 330 hp in the coupe.For this generation, there are notable differences between the Japanese and American models. For example, the US received a hard-top convertible version of the G-Series from 2009 until 2013. From 2010 to 2012, Infiniti also offered an entry-level G25 sedan with a 2.5-liter V6 engine producing 218 hp; this engine was already available in Japanese Skylines. Japan also received a Skyline Crossover, which was sold domestically as the Infiniti EX. G37 IPL InfinitiThere was also the Infiniti G37 IPL. The letters at the end of the name stood for Infiniti Performance Line, a short-lived performance division that the company intended to rival BMW M or Mercedes-AMG. Later, the brand's sporty models were marketed as Red Sport for the Q50 and Q60.The G37 IPL was the most powerful variant, with the engine upgraded to 348 hp and 276 lb-ft. It was only available in the coupe and convertible body styles. It also featured other performance upgrades such as improved brakes and sport-tuned steering. The IPL was available with two transmissions: a seven-speed automatic and a six-speed manual. Pricing InfinitiSince the G Series has been produced for over 10 years, the second-hand market is flooded with many examples. These models were also popular tuner cars, meaning many have seen their fair share of abuse from owners who are not the most caring.The most expensive examples of the G Series are late-model, low-mileage G37s with manual transmissions, with convertibles typically holding their value pretty well. Even the nicest examples cost between $15,000 to $20,000. Meanwhile, the market is full of older, higher-mileage examples that can easily be found for under $10,000.Even high-performance IPL models don’t fetch too high a premium, still costing under $20,000. Q50 prices are considerably higher, likely because the more expensive models are from 2023 and 2024. The most expensive examples are the high-performance Red Sport models, which can sell between $30,000 to $50,000, a figure that would likely drop in a few years. However, base models can be found for around the same price as the G Series. The G Series Goes Away InfinitiThe G Series name was discontinued in mid-2014 as the Infiniti brand renamed its entire model lineup to use a nomenclature starting with “Q." The G37 was renamed to the Q40 for 2014, while the model's replacement, the Q50, arrived in 2015, which would also be sold as the 13th-gen Nissan Skyline in Japan.While the G37 made headway by rivaling Mercedes and BMW, the Q50 seemed to fall behind. The 3.7-liter V6 disappeared after 2015, being replaced with a 3.0-liter turbo V6 that made 300 hp, less than the outgoing 3.7-liter engine. Meanwhile, a hybrid was also available from 2014 until 2018, with a combined power output of 359 hp.The Q50 also adopted a steer-by-wire system, which consumers complained felt less engaging and connected than the more traditional power-assisted steering of the outgoing G Series. Like the G Series, the Q50 also received a notable performance version, the Q50 Red Sport 400. As the name suggests, this bumped the power up to 400 hp. The Q50 was discontinued in 2024, after 10 years on the market with few changes. Unlike the G Series, the Q50 failed to be the budget-friendly German sports sedan rival, never quite matching BMW, Audi, and Mercedes models in performance and technology. The Predecessors G20 InfinitiThe Infiniti G35 was the successor to the G20, a compact sedan produced over two generations from 1991 to 2002. Both iterations were front-wheel drive, four-cylinder models based on the European-market Nissan Primera. Power came from a 2.0-liter four-cylinder making 140 hp to 145 hp, depending on the model year. While these figures may not be the most impressive, the car did have some sporting credentials.The G20 came with the same 2.0-liter four-cylinder engine as in the contemporary Nissan Sentra SE-R and the Nissan 180SX. The G20 also had Nissan’s multi-link suspension system found on models like the 300ZX, meaning this little sedan could handle pretty well. R34 Skyline NissanThe tenth-generation Skyline needs no introduction among American car enthusiasts for its famous GT-R variant from The Fast and the Furious movies. However, it's only one small part of the R34 Skyline family. In Japan, it was sold as an entry-level sports sedan or coupe, coming standard with Nissan’s endlessly tunable RB-series of inline-six-cylinder engines.Not every Skyline was quick, as base GT models came with a naturally aspirated 2.0-liter inline six making just 153 hp and 137 lb-ft. Despite the disappointing base trim, other options were available, such as a 2.5-liter making close to 200 hp, and a turbocharged version of the same engine making 276 hp, certainly fast figures by 1990s standards.