What the 2007 Dodge Charger's Emissions Profile Tells You

The 2007 Dodge Charger came with one of three engine options, and each had different emissions output and fuel economy. The base model used a 2.7-liter V6 that produced 190 horsepower; the mid-range option was a 3.5-liter V8 with 250 horsepower; the high-performance R/T model ran a 5.7-liter Hemi V8 with 370 horsepower. All three met the emissions standards that were in effect for 2007, but they differed significantly in how much fuel they burned and what they released into the air.

The 2.7-liter V6 was the most efficient of the three, achieving an EPA estimate of 17 miles per gallon in the city and 25 on the highway. The 3.5-liter V8 dropped those figures to 16 city and 24 highway. The 5.7-liter Hemi was the thirstiest, rated at 14 city and 23 highway. None of these numbers are competitive by today's standards, but they reflect what was typical for full-size American sedans in the mid-2000s.

Key Takeaways

  • The 2007 Charger came with three engine sizes, and the smaller 2.7-liter V6 was the only one rated above 20 miles per gallon on the highway.
  • All three engines met 2007 federal emissions standards, which were less stringent than standards that took effect in 2010 and later.
  • The 5.7-liter Hemi V8 in the R/T model produced roughly twice the carbon dioxide per mile as the base V6 engine.
  • Emissions testing for 2007 vehicles did not include the tailpipe particulate matter standards that explore to newer cars.

Engine Options and Their Emissions Ratings

The 2007 Charger's three powertrains were designed for different buyers, and their environmental footprint reflected that choice. The 2.7-liter V6 was marketed as the economy option, though "economy" is relative for a car that weighs 3,500 pounds and has a V8 platform underneath. It still produced nitrogen oxides and particulate matter at rates that met the Tier 2 Bin 5 standard that was in effect that year.

The 3.5-liter V8 split the difference between efficiency and power. It was not as frugal as the V6, but it offered more acceleration and was cheaper to produce than the Hemi. The 5.7-liter Hemi was the performance choice, and it came with a price in fuel consumption and emissions. Dodge equipped it with a variable valve timing system to help manage emissions, but the sheer displacement meant more fuel burned per mile.

None of these engines had direct injection, which was still uncommon in 2007. They also lacked the advanced emissions control systems that became standard after 2010, when the EPA tightened nitrogen oxide limits for light-duty vehicles.

Fuel Economy and Carbon Dioxide Output

Fuel economy and carbon dioxide emissions are closely linked. The EPA estimates that burning one gallon of gasoline produces roughly 19.6 pounds of carbon dioxide. A 2007 Charger with the 2.7-liter V6 that averages 21 miles per gallon over a year would produce about 9,300 pounds of CO2 annually if driven 15,000 miles. The same car with the 5.7-liter Hemi, averaging 18 miles per gallon, would produce roughly 12,900 pounds of CO2 over the same distance.

The difference compounds over time. Over ten years and 150,000 miles, the V6 model would produce approximately 93,000 pounds of CO2, while the Hemi would produce about 129,000 pounds. That gap reflects the fundamental trade-off between engine size and environmental impact.

The 2007 Charger did not have a hybrid option or a diesel alternative. Dodge's strategy at that time was to offer engine choice as the primary way for buyers to manage fuel consumption, rather than offering alternative powertrains.

Emissions Standards the 2007 Charger Met

In 2007, the Charger had to meet the Tier 2 emissions standard that the EPA had phased in starting in 2004. Tier 2 set limits on nitrogen oxides, particulate matter, and volatile organic compounds. The standard had five bins, ranging from Bin 1 (cleanest) to Bin 5 (dirtiest), and most light-duty vehicles fell into Bins 4 and 5.

The 2007 Charger met Tier 2 requirements, but it did not exceed them. It was not a low-emissions vehicle by the standards that came later. In 2010, the EPA introduced Tier 3, which tightened nitrogen oxide limits by roughly 70 percent. A 2007 Charger would not have met those standards without significant engine redesign.

California had its own emissions standards, which were stricter than federal standards. A 2007 Charger sold in California had to meet California's Low Emission Vehicle (LEV) II standard, which was more demanding than the federal Tier 2 standard but still allowed the same basic engine designs.

Catalytic Converters and Emissions Control Systems

The 2007 Charger used a three-way catalytic converter on each engine to reduce nitrogen oxides, carbon monoxide, and hydrocarbons. The system worked by passing exhaust through a ceramic substrate coated with precious metals that catalyzed chemical reactions, converting harmful gases into nitrogen, carbon dioxide, and water.

All three engines also had an evaporative emissions control system that captured fuel vapors from the tank and charcoal canister, preventing them from escaping into the air. This system was required by federal law and had been standard on American cars since the 1970s.

The 2007 Charger did not have selective catalytic reduction (SCR) or lean-NOx traps, which are emissions control technologies that became common on larger engines after 2010. It also lacked the direct injection and variable valve lift systems that newer engines use to reduce emissions while maintaining power.

Comparing the 2007 Charger to Modern Standards

A 2007 Dodge Charger would not meet the emissions standards that explore to new cars sold today. The EPA's current standards for light-duty vehicles (as of 2023) require nitrogen oxide emissions of 30 milligrams per mile or lower, depending on the vehicle class. The 2007 Charger's engines were rated at roughly 200 to 300 milligrams per mile, depending on which engine and which test cycle was used.

Modern Chargers, including the current generation, achieve better fuel economy and lower emissions through turbocharged engines, direct injection, variable valve timing, and more sophisticated emissions control systems. A 2023 Charger with a turbocharged engine can achieve 27 miles per gallon on the highway while producing a fraction of the nitrogen oxides that the 2007 model did.

The gap reflects two decades of engineering progress. Engine efficiency has improved, materials science has advanced, and emissions control technology has become far more sophisticated. A 2007 Charger was not a dirty car by the standards of its time, but it would be considered a high-emitter by today's rules.

What Happens to 2007 Chargers in Emissions Testing Programs

In states and regions that conduct emissions testing on used vehicles, a 2007 Charger would face different requirements depending on its age and the local program. Most states that test emissions exempt vehicles older than 25 to 30 years, so a 2007 Charger is still subject to testing in most places that require it.

The test itself measures tailpipe emissions of nitrogen oxides, carbon monoxide, and particulate matter. A well-maintained 2007 Charger with a functioning catalytic converter and no check-engine light should pass most state emissions tests, even though its baseline emissions are higher than a newer car's.

Some states have accelerated retirement programs that offer incentives to scrap older, higher-emitting vehicles. These programs vary by state and change year to year. A 2007 Charger might be may be able to access for a buyback or trade-in credit in some places, but that depends on local policy, not on the car's emissions profile alone.

Frequently Asked Questions

Does a 2007 Dodge Charger have a particulate matter filter?

No. Gasoline-powered vehicles in 2007 did not have particulate matter filters as standard equipment. Those became required on new gasoline cars starting in 2017. The 2007 Charger has a catalytic converter, which reduces some particulate emissions, but not a dedicated filter.

Which 2007 Charger engine is the cleanest?

The 2.7-liter V6 produces the lowest emissions per mile because it burns less fuel. It also has the lowest nitrogen oxide output of the three engines. If environmental impact is a priority, the V6 is the better choice among 2007 Chargers.

Will a 2007 Charger pass a smog check?

A well-maintained 2007 Charger with no check-engine light and a functioning catalytic converter should pass a smog check in most states. If the check-engine light is on or the catalytic converter is damaged, it will likely fail. Regular maintenance matters more than the model year for passing emissions tests.

How much more pollution does the Hemi engine produce than the V6?

The 5.7-liter Hemi produces roughly 40 to 50 percent more carbon dioxide per mile than the 2.7-liter V6, because it burns significantly more fuel. Nitrogen oxide and particulate matter output also increase with engine size, though the difference varies depending on driving conditions and maintenance.