Mercury Grand Marquis

Mercury Grand Marquis: Which Version Should You Buy?

The Mercury Grand Marquis catalogue data points to three clear choices. Buyers prioritizing the best power-to-weight ratio should consider the third-generation 4.6 AT with 235 hp: its 1,795 kg kerb weight works out to about 7.64 kg per hp. For maximum output, the fourth-generation 4.6 AT with 242 hp leads the range and produces 389 Nm, while the 2005–2011 restyled version weighs 1,890 kg.

The Mercury Grand Marquis catalogue data points to three clear choices. Buyers prioritizing the best power-to-weight ratio should consider the third-generation 4.6 AT with 235 hp: its 1,795 kg kerb weight works out to about 7.64 kg per hp. For maximum output, the fourth-generation 4.6 AT with 242 hp leads the range and produces 389 Nm, while the 2005–2011 restyled version weighs 1,890 kg. Buyers who value documented fuel consumption should focus on the 2005–2011 4.6 AT with 227 hp, rated at 13.1 l/100 km in the city, 9.4 l/100 km on the highway, and 11.2 l/100 km combined. The catalogue contains five generations of this Sedan, from April 1979 through January 2011, but the best choice depends on whether power, weight, fuel data, or older-generation specification is the priority.

Mercury Grand Marquis generations compared

First generation, 1979–1991. The first-generation Sedan has one listed version, 4.9 AT, with a 4,942 cm³ Gasoline engine producing 150 hp and 366 Nm. At 1,745 kg, it carries 11.63 kg per hp, the highest figure in this catalogue and therefore the least favorable power-to-weight ratio. Its 68-litre tank is also 4 litres smaller than the tank fitted to every later listed version. Ground clearance is 130 mm, which is 20 mm less than the documented 150 mm of several later cars.

Second generation, 1991–1997. This Sedan has two versions, both named 4.6 AT. The 190 hp and 210 hp variants each produce 360 Nm, weigh 1,720 kg, and have 150 mm of ground clearance. Choosing the 210 hp version adds 20 hp without adding catalogue kerb weight, improving the ratio from 9.05 to 8.19 kg per hp. Both have a 4,601 cm³ Gasoline engine and a 72-litre tank.

Third generation, 1997–2002. The third-generation Sedan offers three versions named 4.6 AT, rated at 203 hp, 223 hp, and 235 hp. The 203 hp car weighs 1,720 kg and produces 360 Nm; the 223 hp car weighs 1,830 kg and produces 359 Nm; the 235 hp car weighs 1,795 kg and produces 373 Nm. Consequently, the 235 hp version supplies 32 hp more than the 203 hp version while adding 75 kg, and it delivers the generation’s best power-to-weight result. The 223 hp version is the only entry with both a measured 0–100 km/h time and gross weight.

Fourth generation, 2002–2005. Before restyling, the Sedan was listed in two 4.6 AT forms: 227 hp with 369 Nm and 242 hp with 389 Nm. Both weigh 1,838 kg, so the 242 hp version provides 15 hp and 20 Nm more at the same catalogue kerb weight. Their corresponding power-to-weight figures are about 8.10 and 7.60 kg per hp. Both use 95 fuel, a 4-speed Automatic gearbox, and RWD.

Fourth generation restyling, 2005–2011. The restyled Sedan retains two 4.6 AT outputs: 227 hp and 242 hp. The 227 hp car weighs 1,876 kg, while the 242 hp car weighs 1,890 kg. Compared with their pre-restyling counterparts, those figures rise by 38 kg and 52 kg respectively. The restyled 227 hp version has documented consumption figures and both versions have a measured top speed of 177 km/h. The restyling remains part of the fourth generation rather than constituting an additional generation.

Mercury Grand Marquis engine specs

All listed engines are Gasoline units mounted Front, longitudinal, with Distributed injection (multi-point), 8 cylinders in a V-shaped layout, 2 valves per cylinder, and No boost. Every version uses a 4-speed Automatic gearbox and RWD.

Power per litre separates the otherwise similar 4.6 AT versions. The 190 hp engine produces about 41.3 hp/litre; the 203 hp unit, 44.1 hp/litre; the 210 hp unit, 45.6 hp/litre; the 223 hp unit, 48.5 hp/litre; the 227 hp unit, 49.3 hp/litre; the 235 hp unit, 51.1 hp/litre; and the 242 hp unit, 52.6 hp/litre. The first-generation 150 hp 4.9 AT produces about 30.4 hp/litre. On output alone, the 242 hp 4.6 AT is therefore the strongest listed engine specification.

Mercury Grand Marquis performance and fuel economy

The fuel comparison can be made only between the two 227 hp cars because other consumption figures are not measured. The restyled 4.6 AT (227 hp) uses 0.7 l/100 km less in the city and 0.6 l/100 km less combined than the pre-restyling version, while both record 9.4 l/100 km on the highway. The catalogue does not provide enough measured consumption data to rank any other version.

Mercury Grand Marquis dimensions, weight, clearance and wheels

Exterior length, width, height, and wheelbase are not measured for every listed version, so a reliable Mercury Grand Marquis length or full dimensions comparison cannot be made from this catalogue data. Wheel sizes are also not measured for any version.

The lightest listed cars are the second-generation 190 hp and 210 hp versions and the third-generation 203 hp version, all at 1,720 kg. The heaviest is the restyled fourth-generation 242 hp version at 1,890 kg, a difference of 170 kg. Only the third-generation 4.6 AT (223 hp) has measured gross weight: 2,305 kg, which is 475 kg above its kerb weight.

Which Mercury Grand Marquis version should you choose?

Choose the third-generation 4.6 AT (235 hp) for the strongest balance of output and mass. Its 373 Nm exceeds the 203 hp version by 13 Nm and the 223 hp version by 14 Nm, while its 7.64 kg-per-hp ratio is better than either third-generation alternative. It also uses 92 fuel, unlike the 223 hp version’s 95 fuel.

Choose the pre-restyling fourth-generation 4.6 AT (242 hp) if maximum output with the lowest corresponding kerb weight matters most. It delivers the catalogue-leading 242 hp and 389 Nm at 1,838 kg. The restyled version has the same power and torque but weighs 52 kg more, so the earlier car’s power-to-weight ratio is about 7.60 kg per hp versus about 7.81 kg per hp after restyling.

Choose the restyled fourth-generation 4.6 AT (227 hp) when documented economy is more important than maximum power. Against the pre-restyling 227 hp car, it is 38 kg heavier but reduces measured combined consumption from 11.8 to 11.2 l/100 km. It also has a documented 177 km/h top speed and 150 mm ground clearance, whereas those two figures are not measured for the earlier 227 hp version.

Choose the second-generation 4.6 AT (210 hp) over its 190 hp counterpart when comparing specifications alone. Both weigh 1,720 kg, develop 360 Nm, reach a measured 190 km/h, and have the same drivetrain specification; the 210 hp version simply supplies 20 additional horsepower.

The first-generation 4.9 AT is the distinct early choice, with the catalogue’s only 4,942 cm³ engine. Numerically, however, its 150 hp, 11.63 kg-per-hp ratio, 68-litre tank, and 130 mm clearance trail later documented alternatives. It makes sense primarily when that specific generation and engine size are the selection criteria, not when the purchase is decided by power-to-weight performance.