Question: In which city is the headquarters of the manufacturer of the engine used in the 1997 Rinspeed Mono Ego?

Context paragraphs:
V6 ESL engine: The V6 ESL engine is a V6 engine used in automotive applications.  It was co-developed by the PSA Group (Peugeot and Citroën) and Renault to replace the outdated V6 PRV engine.  It was introduced in 1997 with the Peugeot 406 Coupé.  It is designed and manufactured by the company "Française de Mécanique" for PSA and Renault.  In PSA, the engine is known as the ES engine, in Renaults, the engine is known as the L engine.

EcoDiesel: EcoDiesel is an engine used in the Ram 1500 since 2014, as well as in the Jeep Grand Cherokee.  Approximately 20% of 2015 RAM 1500s are equipped with the engine, mostly ones sold in Europe.  FCA uses the EcoDiesel name for two different engines.  One is the VM Motori A 630 DOHC 3.0L engine used in the Grand Cherokee, and Ram.  The other is a Fiat 3.0L diesel used in the Ram ProMaster.

Rinspeed Mono Ego: To celebrate 20 years of Rinspeed, Frank Rinderknecht created the 1997 Rinspeed Mono Ego.  The French fashion designer Jean-Charles de Castelbajac was involved in its design.  It was shown at the Geneva Motor show.  Its Aluminium V8 engine, from Korean manufacturer Hyundai, has an output of 410 bhp .

Jaguar AJ-V8 engine: The Jaguar AJ-8 is a compact DOHC V8 piston engine used in many Jaguar vehicles.  It was the fourth new engine type in the history of the company.  In 1997 it replaced both designs previously available on Jaguar cars: the straight-6 Jaguar AJ6 engine (or rather its AJ16 variant), and the Jaguar V12 engine.  It remained the only engine type available on Jaguar until 1999 with the launch of the S-Type, when the Jaguar AJ-V6 engine was added to the list.  The AJ-V8 is available in displacements ranging from 3.2 L to 5.0 L, and a supercharged version is also produced.  Ford Motor Company used this small V8 in other products as well, including the Lincoln LS the 2002-2005 Ford Thunderbird as well as in several Land Rovers and the Aston Martin V8 Vantage.

HG-3 (rocket engine): The HG-3 was a liquid-fuel cryogenic rocket engine which was designed for use on the upper stages of Saturn rockets in the post-Apollo era.  Designed in the United States by Rocketdyne, the HG-3 was to have burned cryogenic liquid hydrogen and liquid oxygen propellants, with each engine producing 1400.7 kN of thrust during flight.  The engine was designed to produce a specific impulse ("I") of 451 seconds in a vacuum, or 280 seconds at sea level.  Developed from Rocketdyne's J-2 engine used on the S-II and S-IVB stages, the engine was intended to replace the J-2 on the upgraded S-II-2 and S-IVB-2 stages intended for use on the Saturn MLV, Saturn IB-B and Saturn V/4-260 rockets, with a sea-level optimised version, the HG-3-SL, intended for use on the Saturn INT-17.  The engine was cancelled, however, during the post-Apollo drawdown when development of the more advanced Saturn rockets ceased, and never flew, although the engine was later used as the basis for the design of the RS-25 Space Shuttle main engine.

Honda Rafaga: The Honda Rafaga series CE4 and CE5 was a compact 4-door sedan sold only in Japan by Honda, introduced in January 1993, and used the same 5-cylinder engine that was used in the Honda Inspire and the Honda Vigor and shared a platform with the second generation CE series Honda Ascot.  "Rafaga" is Spanish for "gust" or "blustery".  The engine is installed longitudinally, the same configuration used in the Vigor and Inspire.  The Rafaga was third in Hondas hierarchy of sedans, and a sister car to the Ascot, which was sold at the "Honda Primo" dealership network.  The Rafaga was sold in Japan at "Honda Verno" dealerships, and was one level up from the Honda Integra.  As with other Honda products, the Rafaga used double wishbone suspension at the front and rear wheels.  The "2.5 S" trim level came with a front suspension upper strut brace in the engine compartment.  In Japan, the smaller G20A engine used regular grade fuel, while the larger G25A engine used premium grade fuel.

River Don Engine: The River Don Engine is a 1905-built steam engine used for hot rolling steel armour plate.  It is a 3-cylinder simple engine of 40 in diameter, 48 in stroke.  At its operating steam pressure of 160psi, it developed 12000 hp , and was able to reverse from full speed in 2 seconds.  The rapid reverse was an essential feature of an engine used for rolling, as delays would result in cooling of the workpiece.  This engine was one of four built to the same design, one going overseas to the Japanese Government, one to John Brown's Atlas plant, and the destination of the final one being William Beardmore of Glasgow.  It is claimed to be one of the most powerful steam engines ever built, and the most powerful remaining in Europe.

Crespi (automobile): Crespi Automotive (1962 - 1976) of Buenos Aires was an Argentinian auto manufacturer, founded by Tulio Crespi, a former racing driver.  Crespi was the first "modern" Argentinian sports car manufacturer.  Their most famous model, the Tulieta GT, came into production in 1977.  It was lightweight and unique, but not very fast.  The engine was not reliable either, a 1397cc or 85 cubic inch engine made by Renault.  It was the same engine used in the 1976 R5 Alpine/Gordini, which produced 93 horsepower.  The C6J Turbo engine was in a couple models.  That same year, 1977, Crespi ended production of the Tulieta GT, of which there are only a few left in existence.  Their logo is available online.  and this is the Tulieta GT.

Detroit Diesel Series 51: The Detroit Diesel Series 51 was a two-stroke diesel engine built by General Motors, Detroit Diesel Division from 1951 to 1959.  Unlike other GM/Detroit Diesel engines, the 51 series designation did not refer to the cylinder displacement, but rather to the year it was introduced.  Two versions were produced, an inline two-cylinder (2-51, 108 cid ) and an inline four-cylinder model (4-51, 216 cid ).  This was accomplished by using loop scavenging ports for both intake and exhaust along with a mechanical blower.  This engine used a dry sleeve with 9 intake ports and three exhaust ports in that sleeve.  These sleeves were located in such a way that the exhaust ports lined up with exhaust ports in the block that were physically higher than the intake ports in the block.  This resulted in pressurized cool air being forced through the intake ports just after the exhaust started exiting (note that the exhaust ports in the sleeves were higher at the top than the intake ports while the bottom of all ports in the sleeve are at the same height.  The net compression ratio is 18:1.  Unlike a two cycle gasoline engine, the crankcase was not used to draw in the fuel/air mixture.  Instead, the blower forced air in the intake ports and fuel was injected by a camshaft actuated injector which was pressurized by a gear pump.  As fuel is injected just before top dead center, little unburned fuel is expelled in the exhaust, unlike a two-cycle gasoline engine.  The elimination of exhaust valves reduced the complexity and weight of the engine.  The power output and RPM of this engine was controlled by governing the intake air and controlling the opening of the injectors with shutdown accomplished by completely closing off the air intake.  The much lower weight of this engine compared to engines with valves made it quite suitable for applications where other engines of the same horsepower were not feasible.  Its uses include: Marine propulsion, generators, pumps, air compressors, road graders and other industrial uses.  It was never factory installed for automotive purposes but conversion kits and engines were made available for automotive use.  This engine design did not see widespread use due to not being able to reduce the exhaust noise to an acceptable level, as any exhaust restriction would have resulted in a reduction of power and efficiency.  It was a very fuel efficient engine with a high power output to fuel consumption ratio.

Hyundai: Hyundai Group (Hangul:  ; Hanja:  , ] ) is a multinational chaebol (conglomerate) headquartered in Seoul, South Korea.  It was founded by Chung Ju-yung in 1947 as a construction firm and Chung was directly in control of the company until his death in 2001.

Supporting paragraphs: Rinspeed Mono Ego Hyundai
Answer: Seoul